@ Erik and appolose.... those sollutions are far better than mine for 4 balls, I just made a conveyor.
@appolose.... as usual there is a more simple way to create an elevator.... I tried this on the unpossible level but it was a bit difficult to do it there.... it works perfectly here though.
http://FantasticContraption.com/?designId=669911
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I made a nice one for "aroud the bend":
http://FantasticContraption.com/?designId=666223
A fast one for going upstairs:
http://FantasticContraption.com/?designId=667327
And a simple one for back and forth:
http://FantasticContraption.com/?designId=669265








