[himalaya]

I have the same problem. I replaced the steel 45T spur with a plastic to have a quiter enjoyment. I spent 2 hours trying to get the center diff spin freely, after countless assemble and disassemble the spur was still touching something. I finally figure it was the chassis! dremeled a tiny bit(0.1mm depth I guess) of chassis off right under the spur, the problem goes away. and like Mentat's picture shows, the spur was so close to the mount that I can't insert a piece of paper into the gap.

Now my center diff spins freely, but new problem comes up. This time it's the pinion's turn to touch the mount. I have to pull the pinion 1mm farther away from the motor to let it run free. WTF do they design it this way. I coundn't use the plastic spur's full teeth width, only 4/5 width is contacting the pinion.

The fact is, Losi designed the plastic spur so wide that it almost get conflict with the mount, but that extra width can NOT touch the pinion, it does not work together with the pinion, which is what it was designed so wide for. Is that logical ?

Yesterday I managed to run my 8ight 2.0 E conv, finally. It did run great but I just can't say it was a perfect design.