i would like to change up my freewheel from time to time, but i don't have a bench vice. i live in an apartment, so even if i had one, i don't know where i would bolt it down without getting in trouble for damaging the apartment. i have a Paul Word hub and three freewheels: 16, 17, and 18t. i have a 32t ring in the front. right now i am on the 16t because i have been using my bike to get around more often, but when i went to the trails the other day i about died trying to climb with that ratio. i have a freewheel tool but there seems to be no easy way to remove the freewheel without a bench nice. ideas?