Amazfit Watch faces

Another problem is the uncompress/compress functionality of a working GTS tool. "Original" GTS bin files are compressed and must be expanded before any try to unpack them. I have no tool found here, which can do this w/o failure.
@Koltes Punti: Most of all watchfaces currently in the GTS gallery are ...

Don't know if this the reason for your problem, but BottomRightY can't be null.
It is always TopLeftY + the pixel height of a digit image.