I’m trying to build this for my new (first!) grandson. I want to make a model so I can get them cut on a CNC. Generating the top hole is easy, but I can’t figure out how to space the holes along the arch at an even distance.

Is there a way to use tape tool, to create guides, along the curved lines?

To help achieve your goals, some time spent at the SketchUp Campus and at the SketchUp - YouTube channel will be very worthwhile. Both sites are from the SketchUp team. On the YouTube channel, pay attention to the Square One Series and Level UP series. They cover the basics for each tool.

A disadvantage can turn into an advantage. You can also take advantage of the fact that circles in SU are really regular polygons. You set the number of sides from the Info object palette - by default, the upper right corner

Long time! Thanks for responding so quickly. I had to look at a few videos about Rotate/Copy and Radial Arrays, but now I have it. I wouldn’t have known what to look for without your help.

I do try to look things up myself and I’ve spent time looking at tutorials. Sometimes, though, I just don’t even know what to search for. The success of a search is so dependent on the correct search term(s).

Ha, that’s clever. I even had to go and change the number of segments for the arches and didn’t think of using the “intersections” where the segments meet.

In addition, it is a very simple, fast and very accurate way to divide a full angle (and not only full angle) into odd numbers, e.g. 17. You will do it faster than they calculate on the calculator and rewrite the result 21.17647058823529 which when multiplied by 17 gives the result 359.9999999999999
In this way, you can divide any angle into any number of segments, e.g. 34.55/47