Cool project JJ, though the concept had me running around in circles. 


 Jim Jakosh 
 .... it is used to start a fire if you have no matches or lighter. Just drop that burning charcloth into paper or tinder and  it lights up quickly,

Fire up a burning cloth to start a fire...
Initially though it was a whistle and now I'm wondering if your blowing smoke with a tune.

Piqued my interest when you mentioned thread chasing.  Been a great fan of the Beall wood threader, (though seems to have been basterdised by Lee Valley), however, that has it's size limitations.  I'm sure there must be a vid on the process, however, Is there any you could recommend?

If your first cut is too short... Take the second cut from the longer end... LBD