(info: hole_circle: equally spaced, uses helix.ngc)
o<hole_circle> sub

#<toolno>     =  #1
#<rpm>        =  #2 (=2000)
#<feedrate>   =  #3 (=10)
#<dir>        =  #4 (=3 2:cw, 3:ccw)
#<inside>     =  #5 (=1 1:in, 0:out)
#<cutdepth>   =  #6
#<zincr>      =  #7
#<zsafe>      =  #8 (=0.5)
#<diam>       =  #9 (Circle diameter)
#<theta>      = #10 (=0 start theta)
#<hdiam>      = #11 (hole diameter)
#<n>          = #12 (=4  N holes)
#<zstart>     = #13 (=0)
#<xctr>       = #14 (= 0)
#<yctr>       = #15 (= 0)
#<spin_notify>= #16 (= 0)
#<use_g43>    = #17 (=1)
#<h_for_g43>  = #18 (=0)
#<verbose>    = #19 (=0)

o<loadtool> call [#<toolno>][#<use_g43>][#<h_for_g43>][#<verbose>]
#<tooldiam> = [#5410 + .001]

#<i>          = 0
#<deltheta>   = [360/#<n>]
#<faceangle>  = 0 (notused helix item)
#<d_angle>    = 0 (notused helix item)
#<r>          = [#<diam> / 2]

o<l20> while [#<i> LT #<n>]
   #<x> = [#<xctr> + #<r> * COS[#<theta>]]
   #<y> = [#<yctr> + #<r> * SIN[#<theta>]]

   o<helix>call [#<toolno>][#<rpm>][#<feedrate>][#<dir>][#<inside>][#<cutdepth>][#<zincr>][#<zsafe>][#<x>][#<y>][#<hdiam>][#<faceangle>][#<d_angle>][#<zstart>][#<spin_notify>][#<use_g43>][#<h_for_g43>][#<verbose>]
   #<i>         = [#<i> + 1]
   #<theta>     = [#<theta> + #<deltheta>]
   #<_feature:> = #<i> (using _feature: here disables stop)
                       (that would occur in helix at spin sub call)
o<l20> endwhile


o<hole_circle> endsub