Stable TST

Stable TST (ステーブルTST) is one of the ground TST openers. This opener was invented by Aotaku1039.

1st bag
You can always stack. If the S-piece is earlier than the Z-piece, use the mirrored shape.

2nd bag
You can always send a TST. There are two forms, with "TST 1" going for an 8-lines PC and "TST 2" going for a T-Spin in the 3rd bag.

8-lines PC route
PC rate is 90.56%. TSD may be sent.

T-Spin route
You can always stack both bags.

TST 2
You can always send a TSD.

6-lines PC
Since the O-Hold TST rate is 33.33% and the PC rate after that is 2.38%, there is a 0.79% chance of sending a PC. However, if successful, a 2-lines PC can always be sent. After that, DPC-Z can be stacked.

14-lines PC (Infinite PC-Loop)
You can always stack everything from the 1st bag to the 5th bag PC, so you have an infinite PC-Loop with just this opener.

Reference

 * [Tetris Opener Organizing Wiki]