Mine has held up well, been driven in the rain & been wheeled & washed a bunch but the truck is stored inside so it's not wet that much.
Most important thing is to cut a generous radius on all the corners (1/2" or so), a square corner will catch on your boot and peel up easily.
I used the Flex-Tred anti-slip from Wooster Products, it's pretty coarse but that's what I wanted for my sliders. I bought it Grainger but probably available elsewhere.
I leave the flying to others . .
I'm a Manufacturing Engineer at Lockheed Martin, currently on C-130's, spent 14 years on the F-22 Raptor (2 working escape systems with the BFG seat & cockpit assembly) and four on F-35. Prior to that was a fabricator & structures mechanic for 14 years. Yeah...
I've had good luck installing & removing grip tape. I'll have to find the data tomorrow but it's a MIL-SPEC product, it use's a clear adhesive backing while the non mil-spec tape I found uses a paper backing.
I'll try to remember to look at the grip tape we use on the C-130's tomorrow...
I've been planning to build sliders for my ex-MOD 110 for years . . . one project of many. But I did find these photos on the web years ago and kept them. It's a good way to deal with the storage box. Like you I didn't want to cut the doors on mine.
I hope this is useful.
That tube passes through the frame and is welded to both sides, it's much more resistant to force from any direction.
When I built the sliders on my 90 I used a tube that was a slip fit and long enough to reach the inside of the frame.