Oceans, I agree that it needs some cambium protection, I just haven't decided on the best option yet. Maybe a thick rubber pad that covers all of the back but leaves the 4 attachment points clear.
Stihl, making it that the bollard assembly could be replaced would not be that difficult (I think). I will take a look at that. It would be nice to have that option, or to be able to have 1 back plate and then Alum., Steel, or SS bollards to choose from. It would also allow the option to set the bollards pins on an angle or horizontal if preferred as Cutthigh askedabout earlier in the thread.