[R-390] Another xfmr question

[Scott, Barry (Clyde B)]

At the risk of being chased off the list...

http://www.belfuse.com/Data/DBObject/pgs28_29.pdf
The same transformer in question 1 has a primary tap at 110VAC.  Is it
unadvisable to run the primary at this tap given a line voltage of 123VAC?

Using the 120VAC primary, the 110VAC tap is a bit too low.  I was thinking
if I run the primary at the 110VAC tap and use the 104VAC secondary tap, I
might get closer to 115VAC on the output.

I assume this isn't as horrible as my first question, but I assume there are
some drawbacks to this plan as well.  Is it simply an effeciency thing that
won't harm the transformer or is there more smoke risk?

Thanks again guys,

Barry(III) - N4BUQ