Anyone using this to add weight to the front end of your shafts? How much weight can you add? They say to use 1/8" rod(?) or a nail. So, what are you using for the rod? Thanks, David

I am using 1/8"X2 1/4" tungsten rod. They weigh 105-115 grains, depending where you get them. The tungsten ain't cheap but is strong.
Jack

Snag:  I believe the folks selling the jig use tungsten rod, which is heavier than steel.  If you make your own jig, can use 1/8 or 3/16 steel or brass rod, also 5/32 brass, all of which are available at most hardware stores.  1/8 inch steel is about 22 grains per inch, brass about 26;  3/16 steel is 52 grains per inch, brass, about 60 grains per inch.  So, to answer your question 2-3 inches of rod will usually get you anywhere from 40 to 150 grains, depending on the material.

I'm cheap, I've been using nails.  I get about 75 grains for an inch and 3/4.  Tungsten is super heavy and strong but it's not something you buy by the pick up load.  

We will have a much longer bit available soon that will aid in adding weight with common materials, as well as extend the internal footing further.