Attaching fenders

I am back building the tear. Still want to use it for the first time before it snows. I have the woody trim temporarily installed. I have installed 8 t-nuts on the backside of the trim. I do have fender welting as well. I planned on using 8 stainless steel 3/4" bolts with a rubber washer to hold on the fenders. Does anyone see a problem with this method?
Heres what I am working with.
Here is a picture of the backside, with the t-nuts installed.
Heres what I am working with.

Here is a picture of the backside, with the t-nuts installed.
