MIKE — I located a local supply of tungston welding rod — $4.18 per 7″ stick of pure tungsten 1/8″. Considering its weight and cost of shipping, plus your hassle in getting it, your source would have to be a lot cheaper before I’d trouble you with it. My plan is to use a minimum of Scotch tape to attach rods of various lengths to the front of the arrow approximating their location if inserted, then measure the various FoC’s to determine what length rod I’ll need to get where I want to be. The minimal weight of a 1/8″ drill hole in the wood shouldn’t throw things off too much.
Any informed advice on any of this would be greatly appreciated. So far as I know. dave