ah, I see. he must have had a pin or bolt he put in the hole first before the clutch bolt. the water trick works so easy there is no stress on the bolt or threads. you can be holding the clutch with one hand, and turning the bolt with the other hand when it pops off. I'll never use the puller again for removal.
Yes, I have hydraulic'd them off but with a puller. Your suggestion makes good sense to me. If you're popping them off without hardly holding the clutch, then there can't be any strain on the bolt/threads. That bolt gets torqued much harder than that when putting the clutch back on and does fine...jmho