^ Nice job! I'll go ahead and update the OP. The sad thing is I knew of that climber trick (I've used it to backroute "The Legend of Smelly Belly"), but somehow never thought to apply it to "One Way Ticket".
I worked out most of the Lemmings Revolution records a few years ago, and I've been making occasional improvements ever since, so most of my records are fairly polished. But, as you've demonstrated, it sometimes helps to have an extra set of eyes looking at them!