Thank you Ken,
I’ve just finished going the long way around the block, but at least it got me more familiar with the software.
I drew the circles I needed, then drew squares measuring 26mm, then positioned each circle around, and after about an hour of copy and pasting, and tweaking XY coordinates I think I got there.
But I’ll be checking out that replicator app for future reference.
I’m still stuck on another problem that I posted in the software forum group though, regarding the Play button being greyed out on UGS… I’ve been stuck on this issue all day!