I needed another corded mouse and this time around I thought of @PKL@mastodon.social and @pronk@mastodon.social instead of Logitech's shareholders. These guys make open source mice among other open source hardware under the brand Ploopy. You can order one from them, assembled or as a kit, or you could print and build it entirely by yourself.
The mouse itself is pretty great. Coming from a long line of Logitech (MX518/G5/G500/G502), it's a bit larger than what I'm used to but I think I'm getting accustomed to it.
Here's another shot of it:
Layer lines, too expensive.
Looks less comfortable than one of those 10~15€ brandless mouses at MediaMarkt
layer lines can be sanded down during making and/or improved upon massively if you are fine with it taking much longer to print. or own a better printer.
the price is steep, but its pre-made and post processed. i think the real value of it is in making it yourself for the price of the components and raw plastic if you already own a printer.
sadly don't have one near. but its a good idea too.
You say "free hand grip for less strain" weird.