I want to start building a kit but I'm having problems finding a right workboard to place the pins in while putting kit together. I tried chipboard but that's too hard, sheet of white insulation foam works but only partially since it does not reseal holes and tends to cave-in if too much pressure placed on one spot..

Coark boards are only available in most cases in 1/4 thick which is insufficent for our pins.

What are builders using out there?

Grateful Canuck