So far, I have bought two of the Fly Racing kits. Initially I bought the BMW M1 which for me was a disappointment as it did not run well on my Scaley Sport track and I had not discovered PG tires at that time. Recently I purchased the Porsche 934 kit and I am getting better performance on the Scaley sport track but even better results on the routed MDF surface. As I recall the BMW kit had set screw hubs and only one motor pod option with only one gearing option. The Porsche came with press on hubs, front & rear, that have a positive locking feature consisting of a flat spot on the axles to which when the hubs are pressed on does not allow slippage. The wheels can be removed without damaging the hubs. It came with three crown gears, which is good because after assembly the pinion gear slipped on the armature shaft and stripped itself and one of the crown gear. The armature shaft has no splines so finding a pinion that is tight was a must. I may switch to a brass pinion and if it isn't tight I will solder it. The front tires had a lot of flash that had to be sanded off and the front axle has a lot of float. The kit came with a second motor pod but I haven't checked to see if it is firmer or softer than the one that was mounted on the chassis. It also has an extra set of pod springs and again I haven't checked to see which set is firmer.
The car body itself is well executed and comes with a light weight lexan interior. I assume this car is a rally version as it has a co-driver.

