Yea, those joystics are going to be used in a dual-jamma machine in the future for the only two jamma games I like, Smash-TV and Tekken 2.
They both use two joysticks for controls on each player and I have another matching pair from another converted machine.
Only thing I need now is a kick harness for each board and the jamma switcher.
On the Dig Dug, the cabinet is still solid and it has the original artwork under a thick layer of black paint. Should turn out good enough since it will be wedged in between two other machines.
Best thing is that I should get a working Dig Dug for less than $200, if you don't count the hours of labor put into it.
-JM