Bob,
Keeping the spacing of the ladder line going through a sill
is sort of a waste of time. Make the spacing whatever is
convenient, since what is between the conductors will change
the impedance from whatever it normally is, anyway. As long as
it isn't for a very long stretch of feed line, it isn't going
to make much difference.
Keeping the ladder line away from metal objects about 3 or
4 times the width of the ladder line (what's that, about 4 to
6 inches give or take a little?).
Coiling up ladder line isn't a very good idea. If you have
any extra, cut it off and save it for later. The length of the
feed line can make a difference in the tuner's ability to get a
match at some frequencies. So, try it with just enough to reach
and if that is a problem, add a little more. You will
eventually
find a 'right' length for the particular bands you want to use
(if
you use the antenna on more than one band).
Playing with antennas is almost never a "do it one time and
forget
it" kinda thing. That's half the 'fun' of playing with
antennas...
'Doc