This is the baggatelle that you may of seen at TCT at the NEC UK in October 2015. It is a three quarter replica of the one that I used to
play with in the 1960's, made by Chad Valley. The printed version is 26 inches long.
It was printed on a bed size of 340mm x 280mm
See the photo for description and instructions. The drill should read 2.3 mm for pins NOT 3mm