In act 2 the platform lift (that u use for the skip) doesn't reset to the same position, it depends on where the bottom most lift is when you pause and reset. To get a perfect run (i think sub-6 seconds is possible, maybe not for humans), you need to reset the platform at just the right height.

sub 6 is possible. I have done it, waiting for run to be approved. I discovered this trick a while ago, good to see someone else found it out too.