Martenson,

I just restored a Aviomodelli Mach 1 which has an ABS fuse.
Also this fuse gave some trouble, and I would really recommend to built a fuse from balsa.
The Mach 1 is really a beautiful plane, and it is worth the trouble.
Attached you find a picture from a few weeks ago with my Mach 1 almost finished.
It has a set of Goldberg retracts, and an O.S. 61 engine.
Last weekend it flew for the first time since 28 years, and it flew very good
So don't give up on the Mach 1!

Succes,

Gert