Dennis:

I'vve not done the BUSA one, but I had the smaller one kitted by Airtronics many years ago. There are a lot of small bits and pieces, on the order of the Sig "Craftsman" kits, like the 1/6 Cub.

So be prepared to spend a fair amount of time, be careful with it, and you'll end up with a nice airplane.

And yes, a 91 4c seems aboutright.

Bill.