I succesfully assembled this PCB, in the end. I made the stupid mistake to solder most of the shiftregisters the wrong way. I started OK, did a double check etc. but half way I went wrong and noticed it to late. I just desoldered them using a blow tourch?! and put them back the right way. This was more difficult because the surface wasn't flat anymore, but it worked. Not the first time of coarse, one little pcb trace was damaged, so when I attached my TPD it did strange. But after beeb-testing the pcb traces of al shift reisters I found the bad trace, repaired it and then it worked!
So my only usefull tip is beeptesting your work with a multimeter to check your connections!
Succes!
Roel