Leading edge Plywood

[RSouthard]

I'm about to start wing assembly on our Classic and having a time deciding on a plywood source. I've used some 1.5mm from Anderson International, for another application, it was perfect. A fellow Hatz Classic builder Scott Plischke was kind enough to send me a sample of his Birch ply from ACS that is around 40 yrs. old and seems much stronger then Andersons. I ordered 2 new 1/2 sheets of 1.5mm Finnish Birch G-2 rated from ACS and they just arrived. Now I'm even more undecided as it seems stronger but has many knots and just not what I want to use for our leading edges.
I did build a mock-up of a leading edge section and used Andersons ply on it and it actually came out much stronger then I expected. The 1/16 Mahogany plywood I have from ACS seems even harder then their Birch for some reason and I really like how strong Mahogany glue joints are as well.

Can any experienced builders / restorers pass along your opinions on types and sources of aircraft plywood for the leading edges and also your input on using Mahogany ply.



Any input is greatly appreciated.