One small point... if your turbo top includes the idle advancement feature on the cold start knob you will have an additional spring to pay attention as you pull the top lid off.
No big deal... just pay attention as you lift the top off... find the fast idle spring and unhook it, then press down on the throttle shaft and pull the lid off.
Another thing to check... the throttle bushing can wear as well as the o-ring... if it does your new o-ring may start to leak fairly quickly. Once you have the throttle linkage and springs apart see if you can rock the throttle shaft in the bushing... if so... the bushing is easy to replace while the lid is off.
Edmonton, Alberta, Canada
2001 silver TDI Jetta Malone Stage 1.5 , 2001 blue TDI Jetta SBIII 216s Malone Stage 3
1970 Bay Window bus
Gone but not forgotten: 1969/1971 Beetles, 1969/1974 Westies, 1979 Rabbit, 1986 TD Jetta, 1992 gas Jetta, 1994 TD Jetta
Here's a small collection of HOW-TOs