Thanks, I would get the wood from my local wood yard NOT a DIY shed. I did consider having a purpose built board, but think it will be quite costly especially for a bespoke size. 12mm top makes sense. Yes I weathered the wagon and painted the figure myself.
Yes to the kit, but the size will be unique and from what I've looked at bespoke production puts the prices up, but I will have a look at his later tonight thanks.
My board will be around 8 foot in length which is why I thought about 4" x 1" as it will only be supported along one edge and both ends, so I need it to be fairly rigid - Thanks Andy