Well, I just finished "re-building" the chassis of my old "cut down Hammond M3. It needed power supply caps and I replaced a few plate resistors (those old carbon comp resistors can drift and get noisy). (I actually bequeathed it to a friend who I left it his basement back in the early '80s so now it's his but I'm the only one who plays it when we jam at his place...so I keep it up for the both of us : )
Then there's his 125 Leslie (no amp) (also left behind by another key player). I want to up-grade the make shift speed switching with a SS triac circuit.
Then there's an amp I built when I was in DeVry for electronics. It was a simple SANKEN SI-1050 G design but I'm pretty sure there was no short circuit protection so both channels are now toast. Since I still have the chassis, ps xformer, caps etc. I decided to re-build it with a newer IC amp module. I have no use plans for it, I just can't junk it. We were using is for the leslie but we just hooked up a Showman head for now.
Then there's a breadboard station with a power supply connections, 1/4" in outs and a bypass switch for fx like gtr pedals. One thing I'd like to build is a sample/hold, AD envelope, and VCF pedal for those Pete Townshend fx.
I work not only with a soldering iron but with a welding machine. In the middle of the day, there was a lot of work with metal, so I decided to buy a welding machine with a flux core, which allows me to turn a wire coil into metal seams with beads. The welder body is completely black with bright white switches and a neon orange power indicator. Four switches and a rotary dial are built into the welder interface. The kit comes with a 1 lb multi-purpose flux-cored wire spool, face shield and brush hammer. I really liked the device, if you are interested, you can look here solderingironguide.com/reviews/best-flux-core-welders/
Coincidentally, my son is a welder; he does TIG, MIG and stick. If I need something welded I give it to him. I tried TIG once and like most things it takes practice and motivation to get good at it. It sounds like you have a MIG welder. It's my understanding MIG is a good choice for a casual or novice user as it's easier to use right out of gate.