Hey, it’s always fun trying to make stuff yourself! Good luck!
I certainly can’t take the credit for the sleeves. I have next to no sewing skills and I only helped design them! All the pattern design, drafting, cutting and 99% of the production work is done by my wife Cat. I just handle all the technical side of things and help assemble the sleeves. I had no idea how much actual work went into making the products she creates until we ran our first group buy a year ago!
The more keyboards the merrier I say! You can never have too many!