I might have missed it, what are you running for a return pump...and how are you running it? I split my return into two lines, and run lockline from the PVC plumbing with the 3" flare nozzles...it works pretty good as well...and I'm sure kevin has some kicking around
I think if you're already looking at the MP line, then you're going to buy it down the line sometime. I was cheap when I started out on some stuff...and now 8 months later I am replacing it with the stuff I was looking at in the first place, and I'm starting to collect a bunch of stuff...food for thought I guess