Thought this might be useful for a few folk around here:
I’ve had reason recently to get some STEP format CAD files into Sketchup. I tried the SimLab extension but before I got it to work satisfactorily the trial period ran out, and a licence isn’t inexpensive. So I was stuck, until I found this:
It’s an online CAD format conversion site. First file (if under 2MB) is free and then it’s €5 for 5 conversions. The process can output DAE (Collada) format that Sketchup can read. And it works, really well.