I built two of those from plans that a a club member was selling for a dollar or two.
Used a OS 15 up front. If I remember right the nose had to be extended 1\4 an inch to get a good fuel tank in. That thing would honk.
I threw the plans away last year. Sheez!

I'll get ahold of an old friend and see if their any more plans around if ya want me to.

BB1