Payne:
You must use the shok buff's. The Sprinco guide rod is quite nice. I leant my ST to the Sprinco guys for development of their product, with their rod or the stock guide rod, use the buffs. Loading .40 to major (about 167 PF), I run an 11 lb wolf recoil spring with the Sprinco. By the way, Angus now has fiber optic front sights for the TS, so if you can get your hands on the new TS fixed rear, replace the OFM LPA rear with one, its a phenomenal sight and add Angus' front fiber optic. I have a new TS in .40 built by Angus to compliment my ST IPSC. I had Angus install the SA Comp Hammer along with the alloy SA trigger, dropped a Sprinco and fiber optic front installed by Angus. Sweeeeet.
Last thing, if your shooting three gun, I would stay away from race holsters and get a Blade-Tec or Comp-Tac for your ST - too much crawlin' and crouchin in three gun for a race holster.
If your capacity hungry, you might want to add the new Taylor Freelance +2/+3 base pads. But the new TS mags available from Mike E at CZ-USA are 17 rounds up from the older 16 ST IPSC mags - this family gun mag can only be bought from CZ.