OTHER STUFF

Hatches

The engines were mounted astern very similar to the Grainger 430, with access hatches from the cockpit, a groove was formed to catch water from 15mm plastic tubing - cut in half, this was glassed to the hatch frame that supported the lid. So far this has proved to be totally ineffective and despite the installation of additional drains rain water still continues to enter the small engine room. I am looking into installing a more effective seal and will update this page with the success or otherwise of this action.
I built 5 other hatch lids in the deck - one in each hull around 2 metres from the bow that gives access to the forward lockers that we use to stow lightweight stuff, fenders etc. These hatches also leak and although not giving that much concern I do want these watertight, as any seas breaking over the bows can deposit some water in these lockers, not a lot but imagine its not a good place to have additional weight, especially in a seaway. Once more I'll update the page with the fix. 3 other built hatch lids give access to the anchor winch and chain and are fine.
I installed some SO-PAC hatches in the cockpit to give access under the cockpit seats. Great gear would use them again and intend to, easy to fit, well built and looks good.
Escape Hatches, well not sure whether these are totally necessary but look cool so installed 1 in either hull in the chamfer panel, I built a small fairing piece in front of them to deflect any waves and save loads on the hatch - which works quite well, great to open at anchor too.

Other Things I Learnt

Probably all common sense, but maybe not all of it as I went wrong at one or two of these places.

Make sure your saloon seats are wide enough, mine were after I increased the seat base, don't forget you will have a seat back cushion that decreases this distance by around 50mm at least.
Make sure you can get all your wiring and pipes in to where you want them easily. I wasted months struggling with difficult access after I thought I had everything in place, maybe put in the pipes first - just a thought
Put your motors in before too much furniture goes in, I did, before the aft furniture went in, does of course mean you have to buy them maybe years before they are going to be used for moving the boat. Oh another point. Buy new engines, don't be tempted by secondhand engines. Most people sell secondhand motors because they are worn out and giving trouble.
Install composite Chain Plates, probably even cheaper than stainless, they do not leak through the deck and are almost invisible from the inside, most new designs have these anyway.

Now on to the painting and finishing - getting serious now.