My restrictions were lifted after 6 months or so, once the leads were scarred into place.
I have coached girls basketball, even with restrictions. It takes a bit of creativity, but the coaching is probably possible if you can allow yourself enough grace to not throw as hard as you can, not twist all the way & demo the moves in very slow motion. Honestly, the kids really can pick up most skills even if you don't do everything at full speed, force or motion.
The mechanic work will almost certainly move your leads. You really do need to wait on that until the leads are secured. It is soooo easy to tossle the leads & the slightest movement can mean you no longer get relief where you need it.
The bow hunting may be out for the long run. If you turn your SCS on while hunting, it can cause your body or arm or hand to jerk slightly, which I would think would be dangerous. If you can hunt with it off, that's probably fine once the leads are in place. As a funny example, my SCS would auto-jump to a higher level at random times. I was sore & was not able to sit on a hard kitchen chair because the battery pack is in my butt. So I was sitting on the edge of my bed, eating spaghetti -- maybe 3-4 months post-implant. The level jumped & I literally threw my plate of spaghetti and meat sauce across the room, onto my computer keyboard. Needless to say, it was ruined in spite of my best efforts to clean it. I had taken only one bite, so basically the whole plate landed on the desk/keyboard/wall/floor. What a mess! lol I just wanted to cry.
I learned after a few times to turn of my SCS while working with anything sharp, anything remotely resembling a tool (including staplers), or anything hot. And after ruining my keyboard, I turned the SCS off while eating (which sucked b/c I was in so much pain & trying to eat while nauseous from pain is miserable).
That said, I love my SCS. I followed the crazy restrictions pretty carefully (not perfectly & that meant that my leads moved a bit & had to be adjusted) -- including setting up a contraption to allow a friend to help me wash my hair while standing up since I wasn't allowed to reach my arms above shoulder height. It's a little while of inconvenience in exchange for years of decent relief & a good amount of decrease in pain meds -- mine went down by nearly 75% and even with that decrease in meds, the pain level went down by 2 points.
Hope that helps,