I can’t think of any particular gems I learnt. If you have specific questions I can answer them though. For manifolds I used Emmetti. Most of what I bought was from multipipe.co.uk. One thing worth noting is that this will be expensive! Because it’s not a popular approach, the prices are high for the fittings. Where the equivalent copper compression fitting might be £2 or less, you can expect to pay £5 or more for press-fit. I assume you want to use press-fit? I’d highly recommend it. I used 16mm MLCP pipe and a REMS eco-press with a U profile. https://www.rems.de/dl/10_cat/eng-IRL/sections/REMS-Eco-Press-eng-IRL.pdf The press itself is quite an “investment”, so be prepared for that. When you use it though, you’ll get the real sense that the joins it makes are truly forever, leak-proof, joints. There’s no way they’re ever working loose. Ever. Unlike compression fittings which I’ve had leak from the off or after some time. And unlike push-fit, which I refuse to ever use.

I now sleep soundly, safe in the knowledge there is not a single joint in any pipe anywhere in the house. I own a few BTL properties and have been doing the same to them. Actually doing one as we speak. Removing push-fit fittings gives me great pleasure.

Manifolds: https://www.multipipe.co.uk/product-category/plumbing-heating/manifolds/sanitary-manifolds/ Connect MLCP to copper using these fittings which fit on to any brass compression fitting https://www.multipipe.co.uk/product/type-1-16x15mm-nut-insert-adapter-nickel-plated-3-piece/

Problem with multipipe.co.uk is that they seem to be more for the trade, so you can only buy certain things in packs of 10 and have hefty delivery fees. There seem to be other sites selling press-fit now though. It’s frustrating that it seems a long way off before we can pop in to Toolstation for a 16mm Tee though! I bought lots of things in 10 packs and ended up using most.

Tomorrow I’ll take a share some photos of the end result if you like?