A Landyachtz Switchblade is a popular choice for DIY if you like double-drops. They’re built pretty stiff for speed, so they hold up well for the stresses of electric. I feel the ground clearance is a bit tight on them for under-slung enclosures, but seeing as you’re top mounting, it might be a good bet.
Not a double drop but a very big drop down, the Landyachtz Evo has 9/10/11 plies depending on which model you get. Not sure which one I have but it’s thick, strong as hell, and anecdotally I haven’t seen issues with strength on any of them
Mines 9 or 10 I believe, but I’ve got a battery pocket in the bottom routed out, bout 2 ply deep. Still feels rock solid, I don’t feel the need to reinforce it even with that done.
Yeah I’ve had 3 or 4 over the years. Them and sector 9 were the most popular brands for longboarders round here. I miss my sector nine kicktail cruiser T.T had it like 8 years before a truck ran over it and almost my leg.