We spent a lot of time on hikerRon's ALberti's Disk cache before we found it. We didn't want to waste all the ideas we had while we were trying to solve it. So now we're going to inflict some of those ideas on the geocaching community.
The cache is not at the listed coordinates. Use the following to find the cache.
erk lsk xss ixe qgl rps vno nbs ljw dum dul hlo xxe htr wkm vjn aai nur enp shw sue jaq jms smm nhz xws ooz bio ifr gvs lla jhh rta xyl uhm qrn lzh aps iai qwp lat fnl wfo rjl xql und mox agi zjj rxz wqr lek dod vjh wkq ucy lij quh eai ixv
Congratulations to hiking_fool and hikerRon for being the first to find this cache! As a result of their feedback, I've adjusted the difficulty level and amended the hint.