A Friend of mine built a home brew DF, based on a Sig Wonderer. Only he made it 80" wingspan and put a Dynamax & Os 91 in it.

He added a vertical fin and a horizontal stab INSIDE the thrust tube! they were coupled with rudder and elevator. Had it hooked to a mixer switch so it could be turned on and off.

He said it was squirrelly and didn't use it but once. Scared the
???t out of him

He offered to let me try it.

I flew it and tried the switch, I thought it was neat. That puppy would do some of the wildest things you ever saw!

Weird snaps, and I don't even know whatchacallits!!!! I had a lot of fun with it.

I tried to get him to bring it to a jet meet, but he didn't like it so he destroyed it, (Burned it) what a bummer