IL Donation
These shapes only leave one block after the T-spin. If you are familier with shachiku train or other SL donation, you may already know what can we do with them.
Col 4 and col 5 are always open after the T-spin which makes them fit in with 6-3/5-4 stacking.
Note that sometimes you can build the same shape with JO or JS.
5-4 Stacking
Since it only leaves one block, you can actually use it anytime as long as it doesn't create a blocked single hole.
Avoid this:
If the block is beside the wall, it is possible to fix it with another donation:
6-3 Stacking
Build parapet using this shape.
Avoid this unless you are going for a TST:
Avoid this:
???:
Create overhang
Use the remain block as the overhang. Some examples:
Find I by extending TST overhang
A method to cleanup TST overhang.
Spin the S in after stacking other parts:
Find I by doing a flat donation
IS and IO variants
These are also floating I donation.
T-spin Fin
The block left by L creates a perfect situation for the STMB cave.
If the width is wider, you can also build this: