Lots of ingenious ideas for storage. I don't have a large shop, just a small 2-car, and I have to put things up when I'm not using them. My current storage is in roller boxes under the 2' X 8' X 3/16" steel-top workbench. I can fit 3 of them under the workbench, and I devote two drawers to the things like grinders. I have two 9" Milwaukee corded grinders, a smaller corded Milwaukee 4-1/2", a couple cheapo 4-1/2" grinders, and a cordless Craftsman C3 19.2 V. This isn't counting pneumatic tools, which I keep in a separate cabinet.
As to pin wrench tools for the various units, I zip-tie them to the cord. I also zip-tie a d-ring to the cord, and if I don't need a tool's threaded shaft knurled round nut, because the abrasive has its own captive nut, I put it onto the d-ring. The cords I roll-up and secure with a Velcro tie, the kind that has a hole punched in one end, so you can loop it around the cord, and have the running end of the strap wrap a couple of times around the coiled cord. Then, it goes into the drawer.
I like the members' wall-hanging pegs and steel straps, and the cart tool hangers, but I don't have that kind of wall space available, and I don't use a roll-around cart to hold tools. I don't have the space.
I do have a positive story about a venerable Chicago Electric 4-1/2" side grinder a friend gave me new, for Christmas, many years-ago. It's one of the orange plastic case models. It's been a real workhorse, and it began a rattling sound, not like a bearing on the shaft going bad, but definitely metal-to-metal. Fortunately, the bevel gear case was easy to disassemble, and I found that the fan on the end of the armature next-to the gear/grease case was now loose. It was a press-fit onto splines onto the shaft, and it had worked-loose after serving well for many years.
I tried staking it tight onto the shaft w/a punch, but that 'fix' worked-loose quickly. I discovered I could still actually use it, just that the fan wasn't doing much cooling, and it made a racket. So, it sat, until I went to my friend's home, who has a commercial two-100 amp breaker Miller TIG welder, I think it's a Synchromatic. I disassembled the tool and he TIG spot-welded to affix the fan to the armature shaft, at ninety degree intervals. I figured that would be the best for balance and vibration considerations.
Put it back together, and it works great! No appreciable vibration problem, it blows air for cooling, and I expect it to last for many more years.
I have some of the 30" square X 12" deep Whirlpool 'Gladiator' brand welded steel cabinet boxes that I have hung on the wall, I have five of them. Inside the doors on their backs is steel pegboard. I use this space to hang cutting and grinding discs, and just by opening the doors I can immediately inventory for replacement, and easily locate the disc I need.