McNeil - Try Dupro 1/2 inch wheels and 1/32 wire on the front, 3/8 inch wheel and 1/32 wire on the rear wheel. I used about 6 inches of wire for the front and 2 inches for the rear. My AA resembles a HZ Challenger with the LG. I inserted the front LG into a slit I cut about 1 cm in front of the control switch, about 1/2 inch deep. I bracketed the 1/32 wire with 2 pieces of 1/2 inch popsicle sticks for stability. I used Gorilla glue to secure the front LG into the plane and packing tape for the rear LG which is attached where the boom meets the tail. With LG and 3 Thill fishing lights for night flying (1 under the nose, the other 2 in the recessed areas where the strut attached to the upper wing, my mono wing AA weighs 22.6 grams. For take off, I use about 8 feet of Hotwheels track as a runway. The front LG straddles the track and the rear LG travels on the track. This allows for the AA to gain enough speed to ROG without spinning. Perfect takeoffs everytime. Just a suggestion that has worked for me.