Some photos of my friends Slingshot Glide that he snapped, then repaired, then snapped again. No fault of the board, he rode this thing HARD for 2 years and he's a 200 lb. guy. He cracked it the first time trying to railslide a submerged boat.
I found it really interesting to disect the construction and see what tricks they hide under the topsheet. Some good info to use as a baseline in building your own board.
Looks like they used a good amount of filler as well to get a clean finish on the dcell core.
Interesting construction, dcell core with a really thin (~1/32") wood reinforcement under the pads offset slighty towards the heelside edge:
Closeup to show how narrow the ABS rails actually are ~3/16" (4.75mm)
Pulled back shot showing the width of the wood reinforcement, it's about 10.5" wide