On the Great Planes puller set:
FWIW, I have it and love it. I do have some tips though. I also bought this puller https://www.amazon.com/gp/product/B00GDAJYSK
The why is because both use the exact same thread on the pusher. This gives you a wider selection of matching pins for different shafts. I've also found that these pins fit into the MTH worm gears and are needed to give you the total pin length required to push them off. Put the silver pin inside the gear, use the other black pin on the Great Planes puller, you can press the gear right off.
For flywheels, I also got this puller since the gap between the motor and the flywheel prevents other types from working. I chucked up the screw section in a drill and used a Dremel and cutoff wheel to shape the pointed tip into a shaft as it needed to match the motor shaft size and actually go into the flywheel some.
https://www.amazon.com/gp/product/B07GFLBY1R/
Again, what I found best was buying the silver Walkera puller set, and using both sets, then you have the ultimate puller set. I saw earlier in the thread that others made custom pins for the Great Planes puller, and that's a good route too, just saying, I don't think folks might have known the 2 completely different brands were compatible, and the resulting combination set can do what the custom pin does, and more.
