Right this weekend I'm going to tackle a job I've been putting off for ages. I need to add a branch to the base of the existing stack which rises from the ground floor to the flat en-suite. Its so I can put the outside toilet in for use by the various trades that will (hopefully) be arriving in due course. Thankfully I think I can lift the stack up by a few hundred mm to aid popping the new branch in but the stack is fairly tight to the corner of the wall. So.....   I've got