calibrating gilsons

[Farid John Ghadessy]

Hello,

Do most people calibrate their Gilsons in-house or send them to an agent? 
I'm sure the buggers here are ripping us off as it costs loads for a 
simple calibration and tune-up. Could we be doing this ourselves and if
so do we need any special equipment?

Thanx in advance and happy cloning.

John F. Ghadessy.
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