I use an osiclating Perry Pump on a Saito 125 because of where tank is mounted. I had alot of flooding issues with the tank being about half in. above needle valve. Starting was a nightmare and Deadsticks were constant. Now i don't even need a starter. It runs smoother that ever before and have had not one deadstick. I still use muffler pressure to keep tank presurised. Best thing i have done for that motor, and so easy to mount anywhere on firewall will work. Had the pump for a yr. before deciding to try it as i just didn't believe in them (had never used one either) now I just prime it and then Chiken Stick. Sometimes i already have starter out for other planes and start it first time with it. Primes faster that way but don't need to, and then it is just a flip or two and there she goes. Perry had a good idea when he invented this ocisialting (SP) dumaflagy.