Well, I've converted my first level for this pack, "Someone must help us!", but I also applied some backroute fixes since there were solutions that, if I recall correctly, don't use the author's intended mechanic.
A single builder must connect three separate points
The time limit reduction forces a particular solution, only because another one is so painfully tight with the 4-minute limit that it can come off as unfair. However, does it appear and play okay to everyone else?
P.S. I can't seem to extract levels from NXP files, or even open them in the editor. Is this intended?
P.P.S. As for "Hit the slopes", it's a fairly straightforward level for the likes of us, and completing it without miners isn't too much more difficult - it just requires thoughtful positioning of the diggers. However, I can make "No miners" a talisman.
ADDENDUM: Also converted Vignette. I hope it's to your approval, Proxima. Admittedly I added 2 bombers to the skill set, just to be cruel! I'll remove them though if I'm taking too many liberties.