[Whizz]

If I wanted, with some trepidation, to have a look at possibly trying to start building say an I-15 bis for the I-153 slot could anyone point me in the right direction to begin studying how to mod such an aircraft?

That is the longest sentence I have ever written.

I'd like to have a go, or at least have a look at maybe having a go and an I-15bis should be relatively easy since it shares a family resemblance to the 153.