I guess I'm a little late with this, but here's a really easy solution for both Just A Minute levels that I didn't see posted, although someone posted a similar, albeit more complicated version. After Lemming #1 bashes to the right, make #2 dig just before he hits the wall (he will be slightly further right than lemming #1). When the basher reaches the spot where #2 dug, this will cause him to sink a little bit but continue bashing. This means #2 can dig until the wall on the left is too steep for the lemmings to escape, yet since the path #1 is creating is now lower when you let #2 bash to stop digging he will only bash one stroke and stop. You can repeat this process two or three more times as the original basher continues to make his way to the right, thereby decreasing the amount of distance the lemmings have to travel when they turn around. Just make sure to increase the release rate to 99 with 35-40 seconds left and you should end up finishing the level with 10 or so seconds to go every time, no problem.