Array with variables and expression builder

Hello all,

I would like to know if anyone has developed a way to produce a polar array (rectangular or linear would be of interest also) with variables and expression builder for either 2d or 3d.  Ultimately I would like to create a plate that has holes in it.  The plate OD would be based on the bolt circle.  The bolt hole would then be arrayed at a value of 6,8 or 10.  An extrusion of the plate would be controlled by another variable.  Or am I SOL and have to use GC?  On that note, is GC for v8i still free?  We don't have AECOSim licensing so we can't use connect.

Thanks in advance,

Connect version update 12

windows 10