After finding the ideal solution to an observation hatch, the idea of having a large sliding roof system seemed very appealing and ticked all the boxes it was supplied basically ready to fit and could be powered by 12 volts so a push button to open and close sounded very posh. (See American Military unit at 1.38s)
The quotation arrived and I nearly fell off my stool!,, £3500 for manual and £5500 for an electrically operated one, all plus VODKA AND TONIC aka VAT. So that's scuppered the plan of a ready to fit unit. I'm now planning on using my fabrication and technical skill to make the hatch myself. so off to the drawing board to plan the process. I'm thinking of having a stainless steel hatch made to plan at a sheet metal works who specialise in stainless steel fabrications, this would be a piece of cake to them. I also need to source heavy guage telescopic runners to allow the slide action, the motorised part may have to wait while i think of a way to do it without breaking the bank.