It's been a while with no further posts, and Minim mentioned wanting to do a thread combining challenge Results for Redux, so I think it's time to get on with the final round of decisions and updates.
Firstly, should we add more levels to Redux? Since I proposed this, we've only had a couple of suggestions, so at this point I'm ruling out expanding the pack to 175 or 180 levels. Going up to 165 or 168 is still on the table (maybe even 162 if just one or two levels get championed strongly), but it's looking more likely than ever that we'll just stick with the current selection. Also, it's now confirmed that my retouches to namida's conversions of the official levels can go ahead and will be the new official versions, so that means any levels we leave out will still have an official version available.
Regarding specific levels proposed: WillLem proposed "Heaven can wait (we hope)" and "The ascending pillar scenario", and this made me check whether we currently have a level that requires using a digger pit to trap the crowd. I don't think we do -- at least not the straightforward type of digger pit and release typified by "Heaven can wait". However, Quirky 28 "Speed Trap" shows the use of diggers to separate a worker from the crowd; Zany 14 "Pitfall" requires a digger pit and is overall more complicated than "Heaven can wait"; a digger pit is the easiest way to solve Zany 26 "Across the Gap"; finally, Manic 13 "Upside-down World" has a talisman for saving 100%, requiring some trickery in containing the crowd -- and, as with "The ascending pillar scenario", this is especially difficult due to the limited space.
So overall I think that, while the two levels proposed are a little different from anything we have, I don't mind leaving them out. Similarly, namida's suggestion of "The Boiler Room" is a great level that I like a lot, but we do already have Zany 13 "Don't leave any Lemmings" to show reaching the exit by bombing through a ceiling.
Any more feedback, or should we just mark this as settled and stick with the current level selection?