Leave one nut loose on the shaft, stops the wheel from going to farYeah. I bought a cutless remover/prop puller last year and learnt my lesson on prop removal and replacement. You do NOT want to be standing behind that thing when it finally decides to come off. Because it's still pissed off from being put on the shaft.
I brush my teeth with it.
@leaky what compound are you using? I use coarse valve grinding compound and never went longer than maybe 20-30 mins on a wheel. Couple lines with a sharpie as posted and you can see the inside of the prop and shaft taper lose their shine as the bronze wears away. Sounds like you have a bad wheel or a compound that isnt coarse enough. Also owned a boat with twins for 6 years and had the wheels off every winter before I knew what lapping was so you wont die if you skip this step on a temp prop. Good learning experience though so worth doing and if this wheel fits as poorly as you say then you should put some time in so you don’t freak out over some vibration that might be caused by a poor fit. Boats....
EDIT TO ADD- is there a thin bushing in that hub? Never lapped a prop with one but looks like it has a 1/8 thick bushing in it? Never worked with one myself