Spec addendum: what the second review found and what was done. One build, one answer (the law changed: PRESS only adds, a hole lets the same through whatever is outside it, the top of the water is a link like any other), what it costs, every sweep run again, and what is left (#30)
Spec addendum: pushes that count (one rule for the catch and for wheels that turn either way), drawing a block two packs know, and every sweep run again (#14, #15)
A water wheel with water falling straight through keeps turning one way when the motor on its shaft is fed by a generator on a second shaft: any motor with a generator's current in it only slows a turning wheel (#18)