3mm wide tabs? But how thick?

I set 2mm wide x 0.4mm thick but due to my z running low for some as yet unknown reason, they came out at 0.15 mm thick.

Sawing these parts out is going to bugger the finish, is there another way?

If not then I might have to revert to sending them out for laser cutting again but i really, really do not want to have to do that.