Highly variable, low resource cost, semi-automated enchanting room
This is a new automated enchanting room design that allows you to have up to NINE different level ranges by changing levers. It doesn't require goo, and only seven pistons.
Level ranges available: 1-5, 2-11, 3-17, 4-23, 5-29, 6-35, 7-41, 8-47, 9-50.