tailpiece
we decided not to build the tailpiece out of sheetmetal. we do it in an easier way,
though 3 parts have to be constructed instead of only one:
a) a 5mm brass rod has to be bent
b) a 10mm diameter brass has to be machined as endpoint for the strings
c) a piece of sheetmetal acts as joint between brass rod and the endpin of the guitar body
Here you can get the drawing of the tailpiece as pdf: