Today I removed the 753 drive motor. I have the early version with 4 hex bolts that hold the housing together. When I removed it, I could spin the shaft by hand. I did a full re-seal, used photos and watched many videos and it was quite simple. Problem is I can no longer spin it by hand. Is that due to the new seals or did I get the rollers mixed up? not sure I should re-install it or not. The internals were perfect and 2 of the O-rings were disintegrated... Its clocked correctly and im sure the reassembly is correct with brass button and ball bearing in place. Thanks...