Is there a sample project with TinyScreen+ and GPS ?

Hey guys

I build a barometer that I can use for skydiving that mounts into my helmet.

The program works fine on a regular TinyScreen and now I wanted to change to a TinyScreen+ because it take less space inside the helmet.

The altimeter readings I get on the barometer are totally different on the TinyScreen+ and make no sense.
I have no idea what I do wrong....!?
I shortened the program to the very basics to find out what the problem could be. Other than the deleting the "Wire.begin();" statement and changing the "TinyScreen display = TinyScreen(TinyScreenPlus);"
is there anything else I need to change in the communication?
Any help is very much appreciated.  Cheers Dan