What about celcons which are transverse rated. I've used them in a block and beam before now as was getting cheap. They're sold as a one size fits all product.
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Went for brushed finish
On another note most trench blocks are aircrete. I think they're supposed to perform better underground than something dense and brittle.
Think @PeterW knows a bit...?
The only way it's possible to avoid is to rip back of base units down or misalign them as like Joe90 pic if you have a worktop overhang on your doors. Peters photo has the worktop flush with the doors which looks good but might not if the doors didn't have the thin handleless edge at top.
I had the leds on latest place. I find they don't seem as bright but I had them because were a lower build height and I only had a 120mm ish void. Also used them in soffit because rated as you say. 12.50 ish a pop, brushed finish if I remember right
I meant is there a loo further upstream of the connection we are talking about? If not I'd say your fine as the reason you put connection in top third is to stop stuff getting caught