A change for "TRS2" V-piece

[KonSola5]

Currently, the V piece is unchanged from original Techmino, with annoying rotation center that is very non-intuitive, making it very difficult to insert V pieces in tricky spots.

My suggestion would be to move the rotation center of this piece to the center of the 3x3 area, along with some SRS-inspired kicks that would work with this rotation center.

[MrZ626]

This change may disable some spin methods, so let me to think for a while longer