Bruce- my good friend, how are you? Glad you are trying the Sistrum stuff- I use the Sp-1's under my modified Altec tube monoblocks with excellent results. I would not hesitate (can't afford it right now!) to use one of the component racks as well, but I would definitely get the brass inner-rod upgrade.
By the way- you sent me an e-mail like a month ago- I didn't see it, 'cause for some crazy reason, my Outlook sent it the the 'Delete' box right away! My apologies, I will respond now that I have seen it- later!
Sutts