Tom,I didn't, but I can.

The Regulator on the Surpass IIwas probably OK when I took it apart. Iwas getting fuel in to the crank case and it was dificult to tune the engine because as it warmed up the mix really changed. It turns out that the seal on the pump shaft was leaking and afte things got warmed up, it starte to seal again. While the engine was cold, there was a huge amount of fuel going into the crank case, and it was pushed up the vent to intake manifold. Ihad a secondary fuel source until the seal warmed up and did it job, so suddenly it was running very lean and would shut down. My fix, or really bypass was to use two "T/s" on the pump lines wiht a small diameter conection between the intake and return lines. This reduced the pressure in the pump so the seal worked OK. Iexpect this is a short term fix, but is has been running great so far. I let the engine warm up prior to flight and I havn't had to touch the needle the last three flights. I found a note in an old RC Universe post from Austrailia where O.S suggested this bypass to fix the over rich idle miix. Seems to work well for a leaky seal also.

The Surpass III has a damaged diaghpgram from cleaning. Ii was doing the same thing as the bad seal on the SurpassII engine, filling the crank with raw fuel that was getting draw into the intake through the crank vent.

My replacement pump was nothing more that a housing of Acetal that held a small chamber with a a 1/32" Silicone rubber diaghpragm, and two Fourmost Check valves. It's kingd of cluncky, but it does work.

I'll make up a drawing of what I did for that and post it. I'm guessing you could make one for about $20 in materials and you could make 20 for about $10 each. The check valves are the expensive part at about $4.50 each. A sheet of 1/32' silicone rubber is about $7.00 from Mc Master Carr, in a 6" x 6" size. You can get 36 diaghpragms from one sheet. The Ancetal rod cost about $22 for a4 ft length which would be enough for 48 pumps. I ripped apart a Robart fueling port for the fittings to press into the pump for the two tubes, There were enough fittings for two pumps and I'm not sure what that piece cost new. The only other thing is a T fitting.

Video at 11

Don