Number of Instances to Skip in Hole Callout

I use the hole call out quite alot and it is very usefull, but i usually have to edit the text to state missing holes.

I was wondering if in the hole call out can state how many holes are missing from a circular patteren??

i.e 18 x Hole, missing 2

     Drill Ø20 Thro'

Even better would be if you could state this in a circular pattern -

i.e 18 holes equal spacing as 20

     Missing 2

     Drill Ø20 Thro'

Text in red is what i would belive to be the varibles for the hole callout.

Any help would be great!!!

Jonny

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