reset

create Cylinder height 120 radius 20 
create Cylinder height 120 radius 8.7 

body 1 2 rotate 90 about y
body 1 2 move -60 0 100
body 2 move -30 0 0

import acis "pillbox-rtop0.sat"

unite body 1 3

compress ids
subtract body 2 from 1

compress ids

modify curve 10 blend radius 7
modify curve 12 blend radius 5

export acis "pillbox-rtop+coax.sat" overwrite

webcut volume 1 with plane yplane offset 0 
delete body 1
compress ids
export acis "pillbox-rtop+coax2.sat" overwrite