{{Clint Eastwood}} Well punk... Do you feel lucky?
Doing recovery with a flatbed can be done if you know what you are doing and doing it safe. I have rolled cars over and winched them out of lakes and wooded areas. Just need the right tools and training thats all. 
I know a company that has their new rollback bed sitting on 55gal drums while they re-weld the main hinge. It broke during a recovery. 
When we sold our old wrecker to buy our F-450 wrecker,we did lots of recoveries with our flatbed.Although it`s not designed for that type of work,it can be done safely without damaging the unit.I have went on courses that learn you to do light recoveries with flatbeds,and for some others a little common sense and technique help alot.The biggest disadvantage to doing flatbed recovery is your angle of attack,unlike a wrecker there is no elevation angle,so pulling vehicles out of ditches,or rolling them back over can be harder than working with a wrecker. 
Doing Recovery's with a rollback WILL do damage to the unit.
I have seen a Century steel bed ripped almost off the frame on a one year old truck that an operator had been written up for prior to this damage, of course he lost his job for it.
No matter what you think you are damaging the sub-frame every time this is done, and it will catch up to you.
WE have a policy that our boom trucks do Recovery's and our rollbacks only transport vehicles.
Ask miller ind if they Will Warranty your bed for Recovery's. You would be amazed how fast they will laugh at you and say. NO Warranty Pay Up.
I've seen one rollback used all the time for recovery work but now it's a pain to use for anything else since now the bed has so many waves in it from buckling up, the beds about worftless now. so they used it in the junk yard to move cars until the engine went and didn't feel like putting any more money in it. A hard lesson to learn. 
That`s why we never use Miller industries equipment!Our flatbed is a NRC Steel Recovery deck and when we bought it the company told us it would be the strongest for recoveries and towing.Now it`s 14 years old and still works like a charm,it`s not all bent and twisted or had it`s hinges broken,the only repair we had to put on it was replace the cable and the hoses.
I must say I've had good experiences with NRC's heavy units. I also think the NoMar (conventional) is an exceptionally well built unit.
I use my flatbed all the time for recovery over the side of the mountain, rollovers, cars in ditches. Like the other guys say, you have to know what you are doing and you have to make use of those snatch blocks during winching and recoveries. A rollover stick helps with rollovers. I haven't done any damage to my truck, International 4300, and I do maybe 4-6 recoveries a week sometimes more. Besides you can damage wreckers during recoveries. I know of a guy where I am that got pulled over the side of a mountain along with his wrecker. Almost killed him. My flatbed truck has yet to even be a little stressed or move during a recovery. Besides the accident recoveries cannot be towed with a wrecker or wheel lift they need a flatbed to transport them after recovery.
The only time I'll do a recovery with a carrier is if I'm in the right place at the wrong time and can do it without damage to my equipment or compromising safety standards.
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