And he also made it clear you should have asked for authorization first, or at the very least notify him. Just because he wasn't mad at you in that particular instance doesn't mean you can jump to general conclusions.
I posted a fix for OverPower’s LeGran Wagon on its thread and he hasn’t complained about that yet.
I would like to mention here that the only thing causing the r34 coupe here https://www.beamng.com/threads/nissan-skyline-er34.40092/ to not work is the r34_glass.jbeam file located in sukairain\vehicles\er34\coupe. I'm too lazy to check if anyone acknowledged this in the main thread and the thread is locked so I can't tell anyone to delete the file. I decided to take a look into what was causing Beamng to crash and I figured this out. Now it works perfectly!
Go into the mod manager and unpack the mod, then click "Open in explorer." The path should be vehicles>DelSol. Then just delete the folder named "lua," which should be the only folder in the DelSol folder.
In order for the vehicle to load/work in the latest version of the game, the lua folder must be deleted. That folder contains files that control small animations like the gear shifter and, I believe, some sounds.