Edit: Various improvements to Insane Steve's Tricky results
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13: R (100%; uses steel glitches)
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27: R (Steel bashing)
Thanks to the lack of water, you don't need glitches on 13 (replay attached). Also, for 27, you can bash under the one-way wall, and build with blockers to the exit to complete the level without using glitches. (The next thing is to check for 100% with glitches, not sure how that'll turn out)
Tricky 26 L 100%. I did have to use the miner glitch at the end though.
[edit: I guess miner glitch is somewhat besides the point since I already used the "push lemming into wall via blocker" glitch/trick?]
I managed it without glitches (replay attached)
Tricky 30R can easily be improved to 100%, using the replay Adam posted earlier. Since he only lost lemmings from climbing off to the left, you can dig a barrier to stop them and get 100%.
Tricky 25R is possible to get 100% on - it turns out
my old no-floater replay is a right-only solution as well!
Updating the list for Tricky now, though there are still some more possibilities to check out.