Hello. Here’s another old exercise from my vault of Solidworks stuff. I’ve set the keyboard up so the main dimensions are controlled via an external equation file. If you have the master sketch file or the assembly open as well as the text file, you can edit values in the text file, save, then rebuild in Solidworks and the part/assembly will update. Cheers, AJ.
Files are available via this link.
https://drive.google.com/file/d/1J_qVuyjm4IodpBokCB8bAAbmNW9VBBlw/view?usp=sharing