RE: Tower Hobbies Fun .51
I bought and built the Tower Extra special when they started to close them out. Picked up the kit for $33 at the time, nice deal.
From the time I got the kit in the mail and it flew its maiden was 12 days and I'm a pretty slow builder. The Extra Special is a twin to the Fun 51 except the profile shape was a little different.
Started out with a Webra .40 black head, but went to an OS .46FX for more power. Put many flights on that plane, its not the best hovering plane due to its quite short coupled. However, this makes it do some great inverted flat spins, it would even climb inverted with the .46.
Put many flights on that plane, very fun. I had no issues aligning the profile fuse to the wing. Do it the same way you would with a standard fuse.