@gustojunk Please send me any STEP files that are giving you trouble. I’ve probably spent more time on STEP import than anything else for V6. Just since the start of the year, it looks like about 30 bugs have been marked as fixed. I still have quite a few on my list, but it’s always worth having more. Almost all of them involve trying to figure out how to deal with questionable geometry in the STEP file.
I’ll try to come up with a test command to turn off the making of blocks for the next WIP. This is, of course, more involved than just adding the commands that you go through as a post-process. If it works well, we can add an option to the import dialog.