Originally Posted by onehundred80
This is a piece of crap. These holes need to be accurately drilled square to the axis. The threads need to be square to the axis. The position needs to be accurate, this cannot be done with a crap fixture like that.
If the conical or dome seats cannot align to the bolts then stresses will occur and the seats will be wrecked.
As I said before they have to done accurately on a mill of some type after locating the center.
Oh I won't argue the point you'd have to be damn lucky or steady enough to shoot the wings off a fly at 200 yrds to use a template and hand drill..but progressively drilling out the threads and opening to final size for tapping with the existing hole wouldn't require the ability to walk on water with it. You really want it right.. then just send them back to the mother ship along with a blank check.