Level 20 Solution Found!!

Spent way too long on this level.

This is the one thing I hate about these kinds of puzzles, once you're stuck you're done, no hints, no skip, no solution provided!

Found the answer buried in Chit Chat... and found other's experiencing the same problem... so here's what was posted:

Yep, use the steel ball and magnet to prevent the lower billiard balll from moving. Then it will not hit the switch so the C4 will not explode, the ball will just run over the C4 and straight into the bucket.

It Worked!