drilling cock and top jaw?

[nekshot]

I have to drill for the jaw screw in the top jaw and cock(new replacements). My question is, should I clamp the top jaw and cock together in a clamp and drill both at same time? My idea keep every thing nice and lined up.

[nekshot]

should this be in Gunsmithing section?

[stubshaft]

Check the travel of the top jaw and insure that it moves perfectly perpendicular to the cock. Sometimes there is a slight forward or backward imparted on the top jaw by the alignment groove on the cock.