Hi BJoe
I wasn't ignoring you.
I was just waiting for Spring to return allowing me to do a proper evaluation over one winter season.
The Zed spent most of its time in an unheated garage.
My hole fills showed no signs of cracking.
I think by using a doner bumper to provide filler material similar to the Zed Bumper, that stress cracks are avoided.
Plus the expanded metal mesh heps in supporting any adhesive / filler you need to apply.
Good luck with your project.
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