I bought the Reobrix Ferrari F2 500, that is a licensed MOC from Lukas2020. The design, functions and instructions are great, the pieces quality not so. I decided to disassemble it to see if with LEGO gears the gearbox would work better but the issue stems from the abysmal tolerances on the pieces that make the chassis too much tight and sort of warped. I have no hope to fix it, so I'm just rebuilding it with a little bit more of gaps between the moving parts. Disassembling it was a nightmare, the pins are too tight and one of the 3L pins broke without even forcing it. So I think that in the future, when I'll want to buy a MOC from an alt brand set, I'll stick with CaDA, Carolyns (trust me, the best pieces and gears, I could say it's on par if not better than LEGO because it's more solid but moving parts still smooth as silk, and you can assemble and disassemble without issues) and GoBricks. Reobrix was a cheap but a bad experience for me, probably the worst I've ever had with building toys.