I would recommend using "bullet" drill bits rather than lip and spur. The ones I use are cnc cut German made. This ebay shop sells them in packs of 10 for a very reasonable price. They also make very neat, precise holes in steel. http://www.ebay.co.uk/itm/PACK-10-HSS-G ... 4aa9615a7e
Jonzjob driling jig looks good. However the hole for the blank need only be drilled, not squared up. The apex's of a right angle triangle fall on a circular path. Using a cicular hole might get rid of any errors bought in when squaring it up.
hi jonzjob No I havent done a celtic cross never heard of it till you shown it . Im a bit new to pen turning more used to rocking chairs tables and stuff but I am certainly going to try a celtic cross . Looked at your photo bucket Impressed jonesbones
The only thing I forgot to put into the cutting of the slots for the Celtic knot is to make sure that the insert wood is the same kerf as your saw blade and also not to cut completely through the blank, but to stop and leave about 1/16" or less so that when you glue it all up with each cut it will bend, with a little persuation, so as to put the insert in but when you clamp it it doesn't move!!