Problems with library TouchScreen_Calibr_native using 3.95"TFT / 16Bit MEGA2560

Please read the first topic telling how to use this forum, how to get the best of it.

Word sallad never replaces technical data. Post code, not links to code, not snippets of code, schematics, links to none standard devices.

What works and what doesn't?
Don't make a mix of everything.
What clear hardware issues are there?
What software issues, wanted versus real result...