The biolab tileset was available prior to 1.43. It seems that it just wasn't added to the set of automatically downloaded styles; you had to import it manually to use it in the editor, and use Flexi to incorporate the style in an NXP when sharing levels.
Yay, and the old editor still recognises them, great!
Thanks a lot, this will make the pack look much less monotonous, with the L2 tilesets to choose from, too! Now the main restriction compared to 10.13 is not being able to combine tilesets, but whatever. The upside of this is that each individual level will look more stylistically consistent!
@Wafflemm: Thanks for the link, I downloaded namida's recycle bin. However, for your external hard drive, X-Lem etc. all the dropbox links give me and error 404 ("link not found"). Did you remove them from your dropbox, and if so, would you mind putting them back in there if you still have them somewhere?
Just to make it clear, unless anyone specifically suggests certain levels of his to go into the Lemmicks pack, I won't simply throw in levels by other creators, especially if they themselves attempted to create a gimmick-heavy pack. Otherwise, we'd end up with complete other packs inside the pack, which would blow it out of proportions pretty quickly.
But if you have any specific gimmick levels which you feel didn't get the attention they deserved (since you said you cancelled the pack), please inform me!