The flex hone needs a lubricant while you're using it. I usually have a coffee can of kerosene that I'll dunk the hone in. Some use wd40, but a gallon of kerosene is cheaper and works just as good. Cleaning the cylinder after the hone is important. I use a scotch brite pad and hot soapy water, then soapy water with blue scott towels, and then a final rinse with brake cleaner. Wipe it down with atf and a blue scott towel to keep it from rusting. The scott towels have minimal lint production compared to other options. I know some use old cotton t-shirts or chamois which will work just as well. When installing bearings, make sure that the surface between the bearing and bearing bore is clean and dry. I use motor oil to lube between the bearing and crank. Some people use grease, especially if it will be stored for a while after assembly. I like motor oil because I check crank turning torque during assembly, and using grease can make it almost impossible to do that. You can use the gapless rings, but if this is only a temporary engine, standard rings will be fine. Just check the end gap on them before installation.