@HaphAsSard
I read your post here
https://www.talkbass.com/threads/strings-for-a-24-5”-scale-bass.1619745/#post-27751911
And it pretty much sums up the challenges or approaches putting strings on guitar scale basses.
I'm going to see if I can find any flats or tapes that are pretty much the same gauge as the ones on it. I guess there isn't much out there that meet that criteria. I could shorten flats if needed, but tapes are not up to the rigors of shortening without unravelling.
Getting some pointers here too
https://www.talkbass.com/threads/short-scale-bass-strings.1497114/
One aspect I didn't touch upon in the first link, being that the OP question was about an old guitar-scale slab with (I guessed) adjustable bridge, but I did in the second as well as numerous times in this thread, i.e. intonation. Assuming your Cort really comes with the usual GSAB D'Addario strings, the bridge has been positioned according to where that nyloncore, bronze-wound set intonates. This means that:
1) steel-core strings of any make, model or gauge, even those that have lately come out for the recent wave of ca23" scale electric uke-basses, will very probably intonate sharp, unless
- you feel like buying double-bass, rope-core strings (you may luck into a special offer on Amazon) and risking their installation, if at all possible (which it might, if you file the tuning post slots wider; I would not go through the centre hole but horizontally through the slot, and I would only cut the string once tuned up)
- you unglue, reposition aways back, and reglue the bridge assembly (bridge pin holes would also require modification), or somehow rework where the saddle sits; a custom, compensated saddle might or might not suffice;
2) per that post, guitar-scale synthetic-core (ergo likely to intonate better as is) flatwound options I'm aware of are
- Pyramid 639 100 (aka Pyramid 235 GS MiniSet; chrome-nickel flatwound over a nylon core; gauges 41-54-075-100)
- Aquila 210U Flat Spirals (varnished copper flatwound on a "Sugar" bioplastic core; 57-72-87-110)
- Kala KA-BASS-4FW-23inch (aka Galli UXB910C-23; nylon-core, chrome-steel flatwound; 60-80-100-130)
3) nylon tapewounds for sub-short scales were only ever made years ago by Pyramid in U-bass scale, and predictably suffered from the above-described intonation problem.
Now, besides their flats, Galli does make another interesting product - nylon core + inner copper thread + black nylon winding - but the outer wrap is actually made of a fine, round-section black nylon thread, not tape. Regardless, you may want to consider giving it a try. Galli UXB810-23 (gauges are, for some reason, a closely-guarded secret).
