Hi ddn,
what engine do you utilize for the demo? Is this your own?
I found a little bug in the train wagon. The lock tumblers are acting quite ad-hoc. Looks like position of one tumbler sometimes influence position of other let's say I have 2450 and turning third tumbler as the last and as soon as I turn the first one again, it skips from 2 to 6. If you play for some time with the tumblers you should be able to replicate this issue.
I am now stuck there - hilight to see. Tried all numeric combinations from the newspapers but to no avail.