Epsilon:
Unconventional Techniques - Thank you for your kind comments!

I also often become very discouraged when presented with a difficult pack. I usually spend endless amounts of time on the first levels of a rank and get nowhere!
What Lems beneath - The trick with the falling bomber eventually led to the last level in this rank - What have we learned so far.
A different kind of problem - I agree that the general consensus that the third hatch is too fiddly and precise. I've put in a fix for this though!
Do I have to do everything? - Another great solution

Send only the finest Lemmings - A very nice solution. I like your variant here with the three blockers instead of four.

Precision engineered Lemming - Now this solution is very creative! Great work on this one!

Round the bend - I like your crowd control and timing here. Great stuff!
Don't forget the builders... - Great solution!
Tarry not! - Another great solution! I chuckled when I saw the youtube comments for this video. I had no idea you were playing through this pack just as I was updating it!

What have we learned so far - As previously mentioned, this level was intended to be a culmination of tricks from previous levels in the rank. In particular, the trick used in Unconventional Techniques and Precision engineered Lemming, where a lemming builds one way, and another lemming falls from the hatch and builds in the opposite direction. The falling bomber trick was also inspired by What Lems Beneath.
Delta:
Entrapment - Nice solution!
Panic room - Another great solution! I'm surprised this level has so many solution variants.
Any suggestions? - I don't consider your solution to be a backroute here! I asked for suggestions, and you gave one that worked

A Humdrum Conundrum - Nicely done!
Oh, those talented Lemmings - Another great solution!

12 Steps to Success - Perfect solution! I find it interesting that the stacker is the one skill that seems to give people the most difficulty.
The Incredible Squashing Machine - Very nice solution!

Make the most of your Lemmings - Another level with variant solutions! I especially like the way you make the glider dig down through the spike.

DEAR LITTLE BEASTIES - Great solution! This level is an homage to POOR WEE CREATURES from the original lemmings. A level that gave me considerable difficulties in my youth

Curse of the Lemmings - Another great solution!
Alpha:
The Locked Room Mysteries - Nicely done on 100%!
Unfriendly Neighbours - A great solution! The main problem behind this level is that the zombies can't be gotten rid of, unless you get them up in that top right room, of course...

These Lemmings and those Lemmings - The direct approach is fine here! Bombing through the one-way walls is perfectly valid, the only issue is that you have to save every remaining lemming!
Crowd Control - Great solution! I'll lower the lemming count, so it's not so tedious to wait for them all.
Thick and thin - Nicely done! Saving 100% on this level is tricky to do.

A Sorting problem - Very nice. But I've made a change which should really ramp up the difficulty!

The Big Dig - This is indeed a backroute. Once again, the direct approach works well

Equivalent Exchange - Very nice solution! I find that laserers are very interesting skills. There's lots of potential for interesting things here.
Fun with Lasers - Another great solution!

Escape from Zombie Island - A very creative way of getting rid of those nasty zombies! Well done!
