I was told that you leave the mag off. I jusst dont see how this will work with the paragon prop hub that i have. I plan on putting my flywheel in a lathe and turning it down to the size that i need. I should be able to acomplish this by removing the crank and putting the flywheel on the crank. then using the prop hub adapter to chuck to to center it all up right. Its gona be a while before I can do this though as i just dont hacve the money. work has suked lattley and i have a lot of chatch up to do