RB,

If you were backing with the Martec Folding Prop, that was about 90% of
your problem.

It take a lot of getting use to, to back with the folder. I find that if
you figure sterrn walk You can pop the Blades open with a fairly high
RPM then throttle way down (Even neutral). You should be able to recover
your direction of sternway. If you don't think you have enough sternway,
Steer off course enough to allow for stren walk and pop the RPM to get
an open prop and then throttle back again and steer in.

Try anchoring a plastic bottle with fishing line and practize backing
into that, in a straight line g

Good Luck,
Ole Thom