i didnt have any jackstands so i guess you can say my procedure was unsafe but i did use one trick, i tied a bungy strap to the puller so if it comes off under tension, the tension will be caught by the bungy strap and break the momentum

1996 Chevrolet Z71 cepek lifted. w/ mods...SOLD!!!
2001 Chevrolet 2500 HD, 4x4, 6.0, Rancho RSX9000, 315x75 BFG AT's, Wheatley 93 tune, Pacesetter LT's, Outlaw Intake w/ Volant ram air, Magnaflow True X, Taylor 8mm wires.
http://www.imagestation.com/album/pi...?id=2102610814