> i cannot get long presses to work with version 73
> 00AD521A.LM=0020DF07 ; tuner/ long player source
> 00AD521A.LT=0020DF03 ; player/ long tuner source

Does that particular button support long presses in hardware?

To answer, go into the Button Codes Display,
then press-and-hold the button.

If you see a code that begins with an '8' (80AD521A),
then that particular button is not suitably endowed.

-ml