Would you consider putting an elastomeric material between the panel's bottom L channel edge and it's mating surface on the truck? I imagine the box will move and vibrate relative to the truck from wind and road surfaces generated inputs. I imagine that shock loading might break down the foam on the bottom edge of the box over time.
If the EDPM joint acts as a spring which may oscillate at different resonances, I am wondering if any sort of dampening will be required? Maybe the right elastomeric cushion could act as a dampener. Is that something you are taking into consideration?
I was not thinking about resonance but a few days ago I ordered my EPDM and made sure I have enough to add one band exactly as you say, pictured below, red line. To avoid having both fiberglass profile bumping into each other, I'm adding one band of 2mm to soften the load between the green and red profiles.
Now, coming back on the resonance. It's a valid point which I have not considered so far, thanks for bringing this up.
On corrugated roads, I'm wondering if this could transmit up the Pinz' shocks and up to the box.
I would have to find a way to dampen the up and down movement.
This type of resonance is not so easy to simulate (I use AD Fusion 360), so many components of the Pinz and box are at play, and the road conditions. I think I will have to wait and see, sticking my Gopro out there while I drive on bad roads to see how the system is behaving in real life. But I should think about a possible solution if this problem comes.
That makes me think, what is not shown there and i have not mentioned yet in my video, the outer bottom of the panel will rub against the fixed red L profile when going up and down.
I was planning to place some Abrasion Resistant Slippery Tape, to facilitate the movement and reduce wear on both parts. Maybe this tape:
UHMW High Impact Abrasion Resistant Slippery Tape
