My new 70cm preamp came in today! I got the ARR mast-mount version. I wasn't sure I'd hear any improvement, but it's very noticeable. I was able to hear QSOs on SO-50 down to about 15 degrees tonight, whereas before, 20 was really stretching. I am using a turnstile in the attic with reflector elements at about 9.25" below the radiators. I can see that I'm eventually going to have to build more robust versions of my turnstiles and put them on top of the roof.
My power supply is a bit odd, so maybe someone will get a kick out of it. I have an Atlas 210X left over from years ago, and the PSU will power either of my bricks. The 210X slides into the PSU which an SO-239 on the back of it. In order to get the power up to the preamp, I added a fused switchbox and sent the power through that SO-239. This allowed me to just screw on a Radio Shack 50 ft length of RG-58 without having to cobble up a connector on the rig end.
Bob - AE6RV