Wah! I admire you...To solve the problem of deciding whether to get a fast motor or slow motor, I contacted the seller and decided to buy both ... so much cheaper as compared against buying from a physical shop in S'pore (probably bcos the shop in S'pore need to pay rent amongst other things). Cheers
The great philosopher once said, "when in doubt, buy both. Problem solved."
His name is Ryan. Haha