50/50 Here. I would go with the perry VP30. I have 3 OS 1.60FX at the moment two with out the pump. One on the pump. Also several others with and with out.
It's my understanding the Cline regulator only regulates the pressure the needles get and it relies on muffler pressure to get it to the regulator. Where as the VP30 actually sucks the fuel from the tank and pushes it to the needle valve with out muffler pressure. I would think that if you mount the tank further back on the CG for 3D stuff you would be better off with the VP30 as it would be more consistent as it does not depend on muffler pressure in the tank.
Pat