Some UCD owners lowered the tank after modifying the lower nose by removing the cooling channel. Look in the UCD 60 thread. Some guys even posted pictures of the mod. I use a Cline regulator on my UCD 60 with Saito 100, stock tank location. Why, 'cause I had the Cline from a parevious installation. On my UCD 46, I don't use a regulator or pump and stock tank location - with an OS .70 Surpass. I have no problems with either set-up. The Cline does keep the needle setting consistent throughout the run.