Andrew - winds were too high here today to fly. We are having gusts of over 30MPH, so I didn't even try to fly, though I did set-up in the backyard and run them. This is my results for just taching them in the backyard and weighing them. My daughter happen to bring home from school a precision scale so I used it.
Manuf. Size WT. Tach
APC 12.25 x 3.75 42 grams 14.3K
AJC #1 20.76 g 13.8K
AJC #2 24.8 g 14.1K
AJC #3 26.6 g 13.4K
Y&O 12 x 4 19.73 g 14.7K

It is strange that #2 did better than #1 since I had to do the most work on it to balance it. Usually I have found that it is the other way around. Hopefully the weather will be better tomorrow. By the way, the Brodak Y&O 12 x 4 prop broke in my hand at the hub when I went to remove it from the motor. Sure glad that it didn't happen in the air! It would have torn the plane apart before I could get on the ground, or stopped the engine. Needless to say, the throttle response on yours was significantly better than the APC. That I expected with the weight difference. The Y&O had the best throttle response, though it also flexes with RPM and is the lightest, but after it broke in my hand just loosening the prop nut, I don't think that I'll order any more. Too dangerous!
I let you know how they perform in the air first chance that I get.
Kevin