I recently strung a tallis using some rather low-quality threads. After I was done, I noticed that for two of the double knots closest to the beged (which we consider deoraysah) were loose, although they can’t fall apart because of the rest of the knots and windings. Is this a problem? I could not find a source that says how tight
I am also not aware of any problem with this, and it seems to be alright.