Being that I am soldier A, B, and C (me, myself and I ), we have found climbing up/down on the 819 can get tiring VERY quick where working from the ground is a LOT easier on the body both from less climbing and a lot LESS finding the ground at a high rate of speed so here is how I mounted my tb. and pioneer tools.
The tb slides on 3/4" pins that are made from long grade 8 bolts that have the heads cut off, using LARGE 1" flat washers to spread the weight and grade 8 nuts torqued to what ever, along with retainers and straps to hold things in place, I can remove/replace the tb. from the ground instead where it is supposed to go which is hurt yourself operation to get/put back.
You will also notice where the spades are mounted, another ground access mod. which is a LOT better then the fall intensive boom mount.
The adapters and pins are stowed in a box up on the 819 (this is also being changed to ground access), If I know that this will be a tb. recovery, I will put the needed items in the cab before I leave the house.
The pioneer tools are mounted where they can be gotten from the ground instead on the INNER sheet metal that is around the crane base, where it is supposed to be mounted is NOTHING but a hassle.
I am still dealing with the sledge hammer/long bar issue but am working on a ground accessible retainer for then, the 819 upgrade is a never ending project, I will most likely be dead BEFORE the upgrades are done or the 819 will turn to dust which will signal the end of the upgrade project.
Hope the above gives you guys some ideas, these ideas can be used on MOST MVs, NOT just wreckers. Remember that when a tb. or pioneer tools are needed that means needed NOW, NOT buried under a bunch of stuff in the bed or having to lift this crap BACK into the bed., this is like having your jack hard to get when you have a flat, it is bad enough to have a flat, led alone doing a hunt and pounce looking for the jack, this is how to make a great day.