I have already received a set of tuners on a metal plate that looks good.
As this plate is 18mm wide I leave the neck plate at a thickness of ca. 20mm.
And IŽll be very very careful drilling the holes and cutting the slots...
Truss rod acces is from the soundhole and the side bars are 8mm wide.
Thanks again for your kind suggestions
I will keep them in mind!
HereŽs a pic of the tuners: