Not to pee on your parade, but did you think about just setting up your HM body with an OFR, since parts are cheaper & more plentiful instead of the discontinued Spyder? Maybe it's not that discontinued if you can make your own, huh?
I have always felt the fulcrum posts were the Achilles heal of the Spyder. If the Spyder had the same blade pivot design as the OFR more people would have liked it IMO. The post heads have a tendency to wear out fast if you use the tremolo a lot and then you are stuck with a slightly shorter neck scale length (intonation issues?).
I know I'm askin' for trouble by speaking my mind, but if you don't stand up for something, you'll fall for anything.