Hello all
A while ago I posted a thread because I was confused by my backsaw (http://www.sawmillcreek.org/showthread.php?t=12824): it had a 6ppi teething, which is appropriate for coarse work while a backsaw is appropriate for fine work. In any case, I followed Leif's advice to simply removed all the teeth and add new ones. I now have some pictures:
*original teeth.jpg: The first thing I did was take off the handle, which immediately solved my confusion, because in the brass back was the original teething. It seems it was ones a larger saw that was simply cut off, reversed and refilled (why???).
*sawvise.jpg: I made a saw vise based on a picture in "Classic Hand Tools" (by Garrett Hack). At first the saw would slide down during filing so I added a rubbery lining for extra grip, which solved the problem.
*new teeth.jpg: I made a piece of paper with 13 lines per inch (using MS Powerpoint). The first run I simply filed ones per line to get a notch for subsequent filing<o></o>.
*2nd round.jpg: subsequent filing rounds shaped the teeth.
Right now the saw is fully filed and set again. The handle has to be attached again, but I want to change it's shape a little to fit my hand better (no pictures yet, sorry).
All in all it was good fun and not nearly as difficult as I thought it would be. The guides from www.vintagesaws.com and www.norsewoodsmith.com and the "Classic Hand Tools" book were all the help I needed.
Thank you all for the advice and help,
Jasper