Russell, do you have to disassemble and remove the primary mirror to replace the springs? Sounds a little daunting, and I'm not sure what springs to get...
BTW, I also purchased a 10" Quattro CF f/4 as a job lot
But I figured I'd 'do my learnin' on the smaller 6" OTA first! Until I'm happy I know the score, the beautiful 10" stays put.