I wanted to start water cooling my build. i didn't decide on whether i wanted hard or soft tubes because i thought soft would be easier but it can leak easier and hard tubing would be harder to do and the chance of leaking are less than soft but im afraid that the tubes will cut the o ring. so idk if any resevoir/pump/waterblocks can go with any tubing size, what tubes are the best, and what fitting fit. If i have to i might get a watercooling kit or go to the ekwb config.