DennisVog said:
The side by side photos are very helpful. I assume that's the stubby, mid-torque (G2), then high torque in the top photo.
Yeah - sorry. The site was being really fluky about pix- I was struggling to get them to even show up and forgot to label them. I just went back and edited the post for clarity.
I'm in the middle of a suspension and front control arm replacement on the family Mazda, and with you in mind I took a couple pix when I was in a sorta-tight spot - removing the caliper bracket bolts:
M18 Mid Torque Gen 2
M12 Stubby:
As you can see both fit, but the Stubby was a lot easier to get in there and position to remove the bolts. And it worked fine to remove them.
A Milwaukee M12 fuel stubby gun can handle most automotive applications provided nothing is seized and you're not using a swivel, including lug nuts. The high torque gun is a one trick pony lug nut/large construction fastener gun. Even then, in a shop environment where you are impacting lug nuts, you're better off with an air impact because of how heavy and bulky it is. I'd much rather be using my MG725 than the mid torque because of the size to power ratio.
My experience has been that the Stubby gets a little selective around 17mm, especially with longer and/or higher-torque bolts. I did the whole suspension on my Mini in late 2020, and it struggled with some of the subframe and other various suspension bolts. The mid whipped them right off. The Stubby has balked at a lug on occasion (and I'm pretty careful with torque). The Mid Gen 2 barely blinks at any of that.
I have much love for the M12, and it's a rock star for brakes, but it really wants a grumpier companion to cover the broadest range of scenarios IMHO.
Most bolts on a car will have clearance issues, even with the most compact guns.
Most? I don't agree with that.
The suspension job I mentioned on my Mini above was not only the literally-entire suspension (including lower control arms), but it also starts with putting the car in the has-to-be-a-euphemism "service position" that involves taking off the front facia of the car, removing the two crash bars, removing the exhaust and dropping the damn subframe (all just to get to the starting point...

).
In any case, though all that work my Mid Gen 2 did most of the work with little in the way of clearance issues (the Stubby kept balking at some of the subframe bolts so almost everything other than the brakes was the Mid). I did have to use a fairly long extension for the rear strut mounts, but that's about it. (and it worked without issue)
My point is the clearance issues were pretty minimal and few on a Mini, and most were straight wrench-solved scenarios where no power-tools were going to work (e.g. the inner bolts on the rear upper control arms - but that was just one bolt on each side). I doubt there are many more-challenging cars than that.
I have a full line of Ingersol Rand impacts (1/4, 3/8,1/2, ratchet), only 1 is indispensable: the high torque. I know that I can take off the crank pulley bolt, axle nuts, large suspension bolts without resorting to cheat bars. Sometime when long extensions/adapters are needed to avoid obstacles, there will be substantial torqu
I'm not trying to be snarky (honestly), but it's posts like this that put a 2767 in my garage in the first place. I think I understand much better now what I think your post and the ones I saw then mean/meant: For a crank bolt, even the hand-tool scenario is a PITA and challenging, so a high-torque is the perfect tool for that job over nearly anything else short of a powerful air tool.
The thing is, I may never do a crank bolt. My Gen 2 Mid has had zero struggles with axle nuts on my wife's Odyssey, my Mini or the family Mazda I'm working on at the moment. (Having added one for the Mazda on Friday, I now have four freakin' monster sockets for the different sizes of axle nuts on our five cars

). I've done shocks on four of the five family cars, control arms and brakes on three, etc. - so a fair bit of suspension and brakes, but no crank bolts. Honestly, I may well send any car I have that needs timing belt/chain work to more capable hands than mine.
At the end of the day, I'd define "indispensable" a little differently: For me, it's the one that can do the most jobs. That definitely doesn't describe the High Torque/2767. It's a monster, but would have struggled for space in any of the jobs I did over the last few days on the Mazda where it would have even fit in the first place - and for at least 2/3 of them I would have been stuck with hand tools due to its size. It would have done almost nothing on the Mini.
I sold the 2767 and used the money to buy the Mid Gen 2, and that's the one I definitely consider indispensable. If I have to choose between the Mid and the Stubby, it would be an easy choice to keep the Mid.
My $0.02.