I had a 14" slab saw that i really liked, but i often thought that i would have been much better off with two saws instead, one 10" and then one 18" to 20". Of course that is so much more expensive than just one saw. It would be optimal, if a company would make a combo slab saw that had a quick change blade and would take both a 10" and 18" blade. I have always wondered why the oil resevoirs had to be so big. Instead of being a large rectangular shape, why not be narrow and long, say like 8" or so wide so that you use a lot less oil. I don't think that you need all that oil for dissipating heat from the blade turning in it, but maybe it was so you could go much longer between cleanings as you would have a lot more oil to soak up rock dust from cutting. Does anyone know why the oil tanks have to be so big and why you couldn't have a deep but narrow tank that could handle blades from say 10" to 18". With blades with a wide variance in diameter, you would probably have to raise or lower the tank, so that the blade only goes so deep in the oil, but that doesn't sound like much of a design issue. Sounds like a great idea to me, surely its been considered before.