Sorry in advance for resurrecting a very old thread. I'm rebuilding an original BiSide and will be swapping it to a contra drive. I've read that the stab fences are worthwhile with a contra. Similar to extra fin area. If anyone's like me, and hates to throw anything away if it has to do with airplanes, maybe there's a stab fence kit out there that didn't get used :-)
Thanks!
Scott