I do need a ring of holes, I am very aware that anything that is repeated in Rhino causes major slowdown.
Tis file of mine sees anything pasted from it take 15 secs to appear in a new file, ditto anything pasted in, and takes a while to save. Dare not slow it down any more.
I see someone doing a perforated plate with hundreds of holes, I feel for him !
Crosses wont do as the holes need to be see through as other items run through them.
How does one make the hole a block instance ?