Good Morning, GarageBoy,
The time taken to fill or empty the tank is normally relevant only to the developer solution because that's when the timing can be fairly critical. It's not difficult to work around the problem. At the end of the pre-soak, kill the lights, pop the tank top, dump the water, pour in the developer, replace the tank top, turn on the lights, and proceed. Do the same thing at the end of the developing step, except for dropping the reels into the film washer and using the time the developer is being washed out to rinse the tank and the top before pouring in fixer. After the reels are back in the fixer and the top is back on, timing isn't particularly critical, so the slow dump and fill times won't matter much.