Hummingbird

The Hummingbird is a quick and efficient T-Spin Single opening setup for early S/Z bags. It only requires 5 tetrominos to execute, and can easily be followed up with an STSD.

Build Order
In order to build the Hummingbird with an SZ start, it is required to place exactly one J piece or L piece before the T-Spin Single. The I piece can be placed after the first J/L in its respective position regardless of whether it comes before or after the T-Spin.

In cases where both J and L must be placed before the T-Spin can be executed, a similar setup can be used. Note that in the following example, the O block is on the other side of the T-Spin, thus it is essential to know the queue before choosing this setup or the Hummingbird proper.

STSD Transition
The following setups cover most circumstances when transitioning to an STSD.

After the TSD
Other than making a T-Spin Double, the TSD can be converted to a T-Spin Triple, Imperial Cross or Trinity.

Following an early J and L
After the usual T-Spin Single, this setup can result in an Imperial Cross, given the setups below. The first two setups have a decent chance of resulting in a Perfect Clear, but the third setup should only be used for unfair bags, which cannot result for a Perfect Clear.

First setup: 23 solutions

Second setup: 1 solution