Thanks Dan I had a Cline regulator in a Sig Cap 231 EX last year. It was a running on a Moki 1.8 and it worked very well. The cost from Jim Cline is $50 shipped. The Perry VP30 is around $26 plus S&H from Tower Hobbies. I didn't know about the muffler pressure being enough for the Cline. I had my cline running with crankcase pressure. Interesting observation you made about the mid range load ups with the perry pump on a regular carb. I think I may have been experiencing that a little bit with the Tower 46 I had it hooked up to. Now I have a decision to make. Hmmmmmmmmm. Thanks, Mike