I discussed the need for the necessary jigs to hold down the pattern

with

the local machinist (my Pommy Mate up the road). He tells me POM

stands for

Prisoners Of the Motherland.
Believe me Paul, there is a lot needed to hold this sucker down for
machining, however my suggestion will give a larger footprint - which

will

help.
This way I can hold down the machining costs, but I still have a

one-off

costs in the Jigs.
OK!
George (down under)

George,
 Add three tooling pads (ears) to your pattern. This makes it easy to
target, clamp and machine without distortion from clamp pressure.
  Larry Wiechman

 
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