Will, I forgot to mention that my early experience was also with the Cox 049's, 020's and one 010. The tiny mill was really something. Back in the day (maybe around '70 or so), I saw a Pitts bipe construction article in the old AAM so I decided to just use the drawing in the mag to make a tiny profile bipe for the 010, with about 16 foot lines. No handle, just looped the strings on my pinky and index fingers. Man did that little thing fly well but I had to be very careful with finger movement since it was very responsive. No need to move the wrist at all; just slight finger movement is all it took. Fully aerobatic, the little Pitts (about 10" span and maybe 3 ounces) was a hoot.