After a nervous 16 hours wait it seems as if the Silicone has cured OK and the large Church window mould is complete. A few scrappy edges here and there to clean up but generally it's turned out very well. In hindsight I used way too much silicone (and it costs a fortune), I now kmow next time I dont need to make the mould quite so deep, but I was worried about making the mould walls too thin. Next step is to cast, still undecided whether to go plaster or resin (or maybe even metal).....will have a think as will not be casting till after my holiday.
Flush with my mould making success I ve started work on carving a set of stone walls from blue foam that will form the the Graveyard wall. I looked at buying enough plaster walls to make the graveyard and estimate that it will cost me about £30.00, the same cost as the silicone is to make my own moulds.
As plaster costs are relatively low, this will give me freedom to use the moulds to make walls for the whole of the town, and produce a few extra stand alone for the club/ebay at very litle cost.