BUSA Spad firewall
I am new to 1/4 scale andgetting ready to put the firewall in BUSA's Spad. The kit comes with a 1/4 inch ply firewall, I will be installing a 31cc Ryobi conversion engine. I have read that the Ryobi requires a 3/8 inch firewall. Is the 3/8 plynecessary or can I use the 1/4 inch that comes with the kit? Thanks Tom