BlackPredator72

Thnx for the info. Will search for a merged collection then and keep them all in my collection.

Yes I understand that. But I downsized my collection of roms from 110+ GB to 14GB, it would be nice to have LaunchBox do the same for the associated CHD files. So instead of 500GB of CHD's only keep the necessary files and maybe have only 100GB. And how do I know which CHD's to keep? (working ones) BIOS files can be downloaded again very simple so that's not the main issue.

I like this option in LaunchBox to import the working roms of a MAME collection. It saves a lot of disk space with unplayable/not working roms, clones and other garbage. Followed this tutorial: https://www.youtube.com/watch?v=GZfoOTckURA&ab_channel=4ppleseed The only thing missing is that it will not import the needed BIOS files and the associated CHD files (or do the imported roms don't have CHD's?) This could be a nice feature. Or is it already possible?

My drop down fields are not visible. Is there a fix for this? Even when I move the window to the right, the fields are still out of bounds...

Thnx for the wheels! When I saw them, I replaced my "wheels" without a blink ? Still need 170 system wheels to go... tried one myself, but I think I let a professional do this. These are the one I need (and maybe other people too): Wheels to do link