[Oblarg]

The worm in the WormBox consists of a plastic worm on a metal bushing. The connection between these two is not as strong as it should be (it appears to be a rather weak interference fit), and so under load the plastic can slide on the bushing and get pushed into the CIM mounting hole, causing lots of friction and eventual failure.

We discovered this before it became unmanageable and, with the help of the NASA machine shop, were able to push the bushings back into place and secure them there with pins. Such pins should be standard to prevent this from happening in the first place. Other than that, they were surprisingly durable for plastic gearboxes and the encoder mounts were very handy. Would purchase again, provided this problem is fixed.

We also received a hex hub that wasn't bored anywhere close to straight, and was unusable. We seem to encounter little QC problems like this every year, and while they're not crippling they are a constant annoyance.