Well the way I make the 3 cup it does revolve how big your tank is. I made my tank I'm a custom fabricator by day and dip on the side and my tank is 48 by 40 inches dip area. That's why it's a 3 cup. I'll send ya a 3 and a 1 cup now but start making a 5 cup roller just to see if thats too much to handle. I won't charge ya for it , I just wanna see. 3 is easy for me to handle and I'm sure at first guys are kinda watching everything but it does all the work you just gotta roll. So I think 5 is definitely do able.