[Al Skierkiewicz]

Mrjones,
Under R02, d
d. The following additional structural parts, fasteners, and materials are allowed provided that they don’t violate other rules, such as safety, entanglement <R03>, etc. This includes no limits on quantity and size of the following materials:

2. Standard bearings and bushings.

I would interpret this as COTS devices listed as "bearings" or "bushings". The way you phrased your question, I am guessing you plan on using teflon bushings at the joints of the scissors lift. Under this rule I would expect them to be legal. The Q&A is the final answer however.

Ryan, the KOP bushings would be covered under R01 since they are "TETRIX, LEGO, and/or MATRIX" parts.