Yes, yes .. why not .. I should not reply but when it comes to communication, and language barriers, I can’t resist ... English may not be my first language but I will never post something like the OP because it doesn’t make sense, and this is not to be insensitive, it’s just is to state things as they are .. OP asks for help but he doesn’t really seek for any help and in the end he didn’t really need any help; the whole thing doesn’t make sense.
I personally tried many flatwound strings models including the Fender and LaBella LTF-4A, which is the model you have referred to.
I was using only roundwound strings before; now I replaced them on all my basses with flats.
The Fender strings have a too high tension and they are too much bass oriented for me; negative judgement, albeit they are cheap.
LaBella LTF-4A are characterised by a lower tension, comparable to that of Chromes; they have slightly more mids than the Fender’s; got them on an Elrick bass of mine.
TI JF344 are the best for me; low tension, right amount of mids and highs; in USA they are expensive but not excessively in Europe.
For what concerns me, the OP can use the Fender strings of whatever other kind of strings he likes; he received a lot of replies, including mine, which he didn’t like, as I didn’t like his somehow childish way of communicating.
The end of this thread seems the worthy conclusion of a drama for good guys.
I had to play the part of the bad one, a bad one, however, who probably knows something more about flatwound strings than the OP for the simple reason that he has presumably tested more models of this strings’ type, and, hence, he’s entitled to speak and, sorry to say, to laugh a bit about how the drama started, developed and ended.
Cheers guys
PS (edit)
I installed a set of nylon strings on a bass but I don’t know if I like them; I will ask TalkBass to tell me if I like them or not ... come on ...