Hello,

I am building a Ziroli Corsair and some of the stringers are grouped closely together and i was woundering how not to break or crack the spaces between the stringers,

Thanks

don't forget that those strings are to be covered with 1/8"balsa sheet stock and then when fully sanded covered with 1oz fiberglass cloth and epoxy. the final product will produce a very hard and smooth surface and no fear of breaking stringers should occur.
Ziroli make a very good warbird as is there is no need to deviate from his plans to produce a very good flying and reliable airplane.
tom