I am planning a project. I have the Revell 1/32 Miss America P-51 that I intend to convert to Precious Metal, another unlimited racer. I found a counter-rotating prop that will work well. My Vacu-form is too small to do the conversion- I will make firewall forward from wood, carving and filling it before beginning regular painting. For vacuum forming, you need to carve a master pattern anyway, so for a one-off- no production intent- why not just use the pattern as the part you need (assuming you will not have an engine in it)?