Hey DP, the SBH x LLP is Fudges (Thunderfudge) work, his seed company is Runningwithlightning. He does a lot of work with Chem and Sour Larry. I've never run anything from him that wasnt at the least very good.
I constructed a small sifter to recover my perlite. Its a small wooden rectangle built with 1"x4"s, approximately 12" wide x 24" long with a 1"x2"x36" handle on each side. It's wrapped in 1/4" and 1/8" chicken wire/garden mesh. It can hold 2 shovels of soil, and then I stand on one side and sift it back and forth. I get beautiful seed starter and most of my perlite back. It's a lot of work, but I havent had to buy perlite in a long time. I'll send you a picture.