Onoff

A bit here:

Length of 2" deep timber, (same width as vertical battens) glued to the floor maybe, pushing against existing stud wall. Geberit frame feet screwed into that? @Nickfromwales.....help! Pretty sure some on here have used the odour extract facility...

The 8cm one does: But this is the 12cm one with the odour extract (could be wrong):

You could add battens to your wall studs to deepen them a bit?

See the flush pipe comes up to the cistern, it branches off to the right at an angle. Until you flush the vertical pipe is empty to the pan so can suck up any nasty niffs. That angled pipe links to your extract: Whereas the 8cm one lacks the angled take off pipe:

Data sheet for H114: ProductDataSheet_PRO_168879.pdf You're better using the product number when searching for best price etc imo for the 8cm one its: 111.799.00.1 Maybe look at the 12cm 111.353.00.5? Has odour take off. Installation bumpf here: 2013-7-29--10-13-50-231.pdf & 2013-7-29--10-13-39-425.243.00.0_00.pdf

H114 doesnt have thd odour extract facility to connect to your MVHR I don't think unless you diy it like Jeremy and now I have. This page gives the current frames and usefully the flush plates available: https://www.geberit.co.uk/products/installation-systems/geberit-duofix/

Slimmer too. Think we had this discussion before ref your stud depth.

As a bit of an aside I half considered this: https://www.gumtree.com/p/plumbing-central-heating/geberit-wall-hung-toilet-frames-x2-/1351844522 But tbh you couldn't get the missing bits and keep under a £100 each frame. Might offer him less.

Bit cheaper here but green backlighting: https://www.tapnshower.com/geberit-touchless-dual-flush-for-up320-cistern-sigma80-black-glass-116-090-sg-1?

I saw this and thought it has your name written all over it. Mainly it was the price made me think that: https://www.bathshop321.com/geberit-sigma80-main-operation-touchless-dual-flush-plate-black-glass-116-090-sm-1/? ?

And what side is the planned entrance door, in the face away from the stream or one of the sides?

Is the balcony/ cantilever going stream side or not?

Honestly my "animation" is crap, a bodge if you like. I did two years C&G CAD but then started the 3rd year animation course but never finished.....I was simply never there as work took precedence. 2cm??? Its your shed not mine. Nothing to do with pooling but water splashing up. Those recycled rubber pads at 5cm high that @PeterW linked looked good if you're intent on going that low. You'd have to notch the timber if you doubled up the front and back beams. Might have another play on CAD later. Was going to show some diagonal supports off the front legs. Isn't 20% cantilever here only 500mm here? As in 20% and your bases are at 2.5m centres? With only a small deck at the front then how about: Double doors overlooking the stream. You could site your chair(s) inside the cabin a bit, feet out on the deck.

Wait until you get to work closely with the upper echelons of the building world, as in the news making ones. Watch the cheapest contractor, with no track record get the job based on price. Sit in awe and watch as specialist consultants are brought in to advise you how to do a job you've done for 35 years. Watch said consultants pander like a puppy to every little architectural design quirk requested and the pair of them have a love in. Further despair as the consultant bends the rules on or even openly flouts respected codes of practice as "they're not law" and end up with said code of practice being dumbed down at its next edition. See these projects years down the line and quietly chuckle thinking "I knew that would never work/not get used/actually be a hinderance to the end user". And the best bit is there's never any come back on the people responsible for writing the spec or their stupid, enforced, unworkable ideas and omissions. Oh, and watch it happen on the next project. And finally wish you'd been born 10 years earlier so as to be close to retirement and that final release.

I like the idea of the built in hose reel on that compressor. Tbh the Aldi compressor I bought, (£29.95 with multiple discounts applied, was £89.95) I use all the time. The attached hose could do with a reel facility though...

My mate tried that switch: "That Quinetic switch paired with the Thinkbee (receiver) no problem ?"

I read that as rodent mash... First pic.....has that osb blown?

I'd just jack 'n pack one corner at a time if required.

More playing! Excuse the dog rough video capture, if you call it that, I just did a free orbit and videoed it on the phone! Reds are notched 6x6. Yellow and blue again 6x2 doubled up on the long sides. (Blues gets screwed to reds, blues to greens, yellows to blues, magenta bits finish off the ends). Magenta, front and back are 6x2s. White noggins down the centre. From back to front all joists at 400mm centres. Noggin not shown at the front will be longer or play with the centres to even them all up. Deck only cantilevered about 645mm as is. Doesn't seem wide enough. How much more can it safely go reliant on those doubled up 6x2s at the end, I don't know? Back corner sits on a 65mm engineering brick or bricks.

Disagree. Bottom of the timber should be 6" up in the air. Its Welsh Wales ffs, it's always wet!

The earlier linked, galvanised post bases are the best thing, hands down. (Unless you can afford to have them made in stainless steel!)

So what about when you get some soil and rotting veg wash down the slope and sit against whatever legs/beam is at the top?

It's proper good this having kids lark! You can just sit back with a beer and let them get on with it:

He doesn't want back legs as far as I can tell. If he had the frame just resting on a 6" high bit of something with a piece of dpm on top, then he could, as you say lift up (with a trolley jack) down the line and replace.