Aquila (Nylgut) strings are good strings! If they don't settle in a week or less, something else is wrong.
The reason I asked about the tuners is that the best I've seen are the pheg tuners on my concert Fluke; That uke has been (accidentally) kicked across the room several times, and it never goes out of tune. I wish my 8-string Kala had them, although it does a good job of staying in tune. El cheapo Chinese tuners, such as on the OS I bought, can't stay in tune.
I'll have more info on this subject after our planned upcoming group visit to the Kala factory.
A Rolex costs a few hundred times more than a Timex but it does not keep more accurate time
I've never owned a Rolex. Many years ago my BIL repaired watches and, when he took my 10-year old Timex apart, he said "all the internal bits are rusty". No surprise to me, because I never took it off, even to shower. I told him to just fix it, which he did.
Several years ago we were having dinner with an RVer who kept flashing his "$X,000 Rolex" watch under my nose. I finally flashed my $34 Costco watch under his nose; That watch is still working and keeps time. No surprise to me because ...
FWIW I was in the watch chip biz in the 70's and 80's, and understand what makes them "accurate". Not rocket science.