due to my mini-z experience, i've always perferred soft h plates vs. stiff. for mini-z, i actually use custom made lexan h plates that vary in stiffness and are nearly indestructible. they will tweak if left bent but easy enough to flatten out.
stock mini-z h plates are very succesptible to breakage due to force and angle of impacts and amount of exposure of the rear end. i find it very hard to believe the dnano will have the same problems unless you get nailed just right on a rear wheel.
thank you for sharing the throttle limiter mod! i recall this being done to the old kt-5/2's way back in the day as well. the training mode is slow enough for my kids but this mod is very useful to keep in mind
if you could, please start a thread in the parts subforum detailing this modification
it will be much easier for people to find it there and it's worthy of sharing!