When you start throwing real money (ceramic bearings) at it or they slice their leg open due to the absolute lack of friction when touching the pedal. you have a problem.
Some of you might find this humorous but I will trudge on. Today I bought 30 lb library display quality unabridged dictionary for my personal library. I questioned whether this was a bridge too far. After some thought, a large well made comfortably upwards tilting display turn table which necessitated frequent dusting would have been a bridge too far. This option has not been ruled out.