Something else here as well. The main reason for excessive coiling on
spooled nylon is because it was stretched while spooling. The nylon
tries to return to its original no non-stretched state, and the
resulting compression on the spool can easily crush or deform it. This
was once a severe problem on multiplying and other reels used for
long casting heavy leads. The secondary result is that such nylon
takes on extreme coiling. This can be so bad that is more or less
impossible to cast with it.

There is no point in heating nylon on a spool!!!! This will have the
reverse effect, and program the coiling!

It only works when the nylon is heated, and allowed to cool in its
normal unstretched state while being held straight. Very light tension
may be used, but any strong stretching should be avoided.

I´m sorry, but I don´t know why it should be disadvantageous to touch
the nylon with the fingers while spooling up. I imagine this has to do
with friction burns, but I don´t know. Tackle shops all use a metal or
ceramic ring for guiding nylon on to spools when using high speed
spoolers.

Ordinarily, when winding line on to a reel, using your fingers to
spread the line evenly is the only option, ( except on reels equipped
with level winds, or oscillating systems), and I have never noticed
any detrimental effects as a result.

TL
MC