Last fall I got an inexpensive 3D printer (Ender 3 Pro) and have been surprised at how it's made "shop life" better. What are your favorite things you've made for your shop? Here are mine:
Pictued above, this have 100% solved how to store these things. Just printed with PLA, they're quite strong and fit the tools perfectly.
#2: Tool Well Storage Bins
I made these to fit my bench's tool well. I had been using jars and other round containers but their shape wasted space and they didn't have internal divisions.
Nice way to keep my most often used bits out of a drawer and easy to find.
#4: 4" x 120mm Dust Hose Adapter
While not glamorous I use this every time I use my table saw.
Like Null said, git gud at CAD. I like Fusion360 (is/was free for personal use) for that and it's always been able to let me build the nonsense I needed.
I've had a few printers over the last 6 years and while people say creality's quality has dropped a lot recently, prior to that I was using a CR10S like a workhorse and it was amazing. Just recently picked up a Sovol SV05 and it's been great too. First time with auto leveling and while i don't fully understand how to use it properly, it is way easier than manually managing the bed level. So, if you get one, make sure it has some form of auto leveling. It'll save you many failed prints.