My DKLM gearbox developed one totally wallered out bearing recess and allowed the gears to completely slip while climbing any incline. Very disappointed.
I happened to have a new Heng Long version on hand so I installed it and never looked back. I did however use the DKLM’s slower drive gear on my Heng Long unit.
Not saying that I couldn’t possibly repair the DKLM but didn’t want to bother with it. If I ever buy a second tank I will buy another Heng Long dual current gearbox for it as well.
edit. Just found my old video.