We did put a MICO on one of the wreckers way back. This damn StupidDuty Ford truck with 7.3 and manual transmission, had the driveshaft park brake. Some bolts sheered off back there, and we never had time to fix it and bossman checked on parts and it was not cheap to fix. I want to say like $600 for everything we'd have to replace to fix that drum brake. So bossman cut a stick to put between the seat and brake pedal and that was our park brake, while I've got the rpm idled up and PTO engaged on a manual trans in N truck that weighed plenty and then hooking up to a car or truck that weighed more, and I'm on a slope on the freeway hooking a car with that bull$h1t ass stick protecting my life or a serious rollaway accident. That was my last tow in that truck. I took it to bossman and I said, gimme my phukin rollback back and shove this POS up your ass, I'm not driving it anymore. Phukin redneck azz BS wooden stick for a park brake? Hell NO. This isn't professional and damn sure not safe. You can at least put a MICO brake on the truck so we can them drop some wheel chocks. He's all about, Well, then WTH is a MICO brake? I asked, you really don't know? No I don't what is it? I said it's a 2x4 about 4 foot long, and get a long bolt and mount it to the side of the truck. So when you reach out the window,, you pull that 2x4, it hits the rear tire and now the truck won't move. PFFFT, LMAO !!! He was like HUH? Cuz I was pist at first, I wasn't in no joking mood, but when he asked like he was really concerned, I came up with the 2x4 BS. So after I couldn't hold the laugh back anymore, I told him what a mico brake is. Found on construction equipment usually, but some safety devices on vehicles too and if you dont' want to fix the drum driveshaft brake, it works like having a monkey in the truck holding their foot on the brake pedal. I took off in the my rollback, did several tows that day and when I got back to the yard to turn in paperwork and money, he was just finishing up and test the MICO brake he went and bought and put on the truck. I was actually proud of that cheap Phuk that day. He thanked me for the idea and said he had no idea of such a thing and it was only $225 for the kit he bought. Easy to install, and far cheaper than the $600 to fiz the driveshaft brake. I did tell him now you know I feel safe as hell with this, but IT IS NOT LEGAL. So I had to explain why blah blah blah, and he said, we'll use this in conjuction with our landscape timber cut offs we use for blocking in the tow bidness to chock the wheels as a secondary. I said good enough. I'll drive it now, Thank You, Sorry for an azzhole but that wasn't safe at all before. So it was alll good. I kept my job and didn't quit or get fired. MICO saved the day.