Coosa board for SF20

[TMala]

Last question! I’m back to square one, coosa is hard for me to find, but my local fiberglass supply has Penske in 1/2 and 3/4 with not 5/8 option. I would like to give them my business. Would putting two in at 3/4 or one at 3/4 and one at 1/2 be an option for me if I add extra glass in the end? What’s everyone’s thoughts on that? Two at 3/4 came out with a thin inner skin, if I put two 3/4 Penske it can’t be any worse than what came out right?