Mini update.
Silver Scudo is bloody brilliant. Got two pipe tubes on it now, my ladders on the roof, racking in the back, USB charger in the front. Does almost 50mpg on long runs. Comfy seats.
Non starting hasn't recurred, I am 99% sure it's intermittent wiring going to the in-tank pump - there are a bundle of wires under the passenger side which are exposed to the elements, last time it refused to start I fiddled with these and it started immediately and has been fine ever since.
Thinking about chopping it in for a LWB crew cab Trafic, but also a bit torn because it's so good.
MOT coming up at the start of August, so I'll see what that brings. If it flies through I'll probably get the AC regassed and keep it forever