[acannell]

Well the coolant pass pull stud is just used to line up the threaded extension. Sure it can be done without one.I was just gonna turn dow that rod to fit in the hole of the stud to hold it in place while I tig weld it to the pull stud.

so you need to core out the toolholder about 3/8" or so for that rod right? is that hard to do? i.e. if i try to do that on the lathe at work, am i going to need a special method or could i literally just drill it through? its just a clearance hole right, i.e. not precise