world Models Sky Raider mach-1 with TTPro .36.
I put everything together and checked the CG with tank empty, looks like I need to add about 3.5 oz (I placed 40 pennys above the firewall. whats a penny weigh? 2.5 grams?)

Anyway, I'll try to move the battery forward but I think I will still need weight added.
Where and how should I add this weight?

I'm thinking on the front of the firewall next to the front wheel shaft or inside the firewall under the fuel tank?


Thanks

Stev