No FEL damage yet and I have a fairly light loader for my 3430 (woods 1009 in picture below on my last tractor)
I've been using a very heavy home made FEL mounted Fisher plow setup on my 3430 since I gave up on my last off road plow truck. I have a few horse shoe style drives that are very uneven. Sitting behind the wheel, I can see and feel the forces that could damage the FEL arms if I let them.
My strategy, which has worked so far, is to try and plow in low range most of the time. A few wide open areas I will run in mid range. I only put chains on the rears, preferring to see the front wheels side slide if the plow gets too heavily loaded while angle plowing.
For small storms I just use the bucket and rear blade. My wife does not like to use the Fisher because it hangs out so far in front of the tractor.
For larger cleanups, IMHO no plow beats the ability to plow snow into large piles than pushing show and lifting the FEL at the same time. (yes a blower would probably do more but I've got too much rock for that I think)
Given enough time, I want to pull the plow in closer to the FEL. I hope to use ideas that I see on 4shorts thread including TTTTTT's. I actually started to look for a QA plate this weekend for that project. I plan to start fresh as I have two old plow rigs to work with.
I like the cushion valve idea and will consider that for my setup.
The picture of my plow setup are pretty old. Since then I added a vertical member to the QA plate so the lift chain would pull more vertical. In the photo the QA plate is tipped forward to allow the plow to rest for these photos, normally the plate would be more vertical to keep the pivot points out of the ground.
The image of the wreck is my best side shot of the full loader before the sun turned the woods paint towards something that looks like a creamsicle. For those that don't recall, that tractor (RIP) had three hours on it when I got t-boned by the big Merc. Wow, this one will be 5y.o. next spring....