Digital BW, The Print

Now that I finally have acquired a densitometer, I've started the
fine-tuning for my QTR printing. I have a few questions (so far):

(1) My 2200 appears to have an "ink limit" value of just about 60% (UC
ink on EEM paper). This would appear to be pretty low--considering
Roy's statements (in "QuadtoneRIP Calibration") about typical values
of 80% or higher for printers like the 2200--and also considering that
QTR's own EEM_2200 profiles for the 2200 suggest a default_limit of
75%. I realize that each printer has its own characteristics, so I
suppose mine is an example of such variability. Or...is it more likely
due to something else (such as a mistake in my calibration procedure)?
Anyone else getting such a low ink limit% with their 2200 printer?

(2) After determining the ink limit value (see above) the next step
--for ink density calibration--calls for printing another calibration
ink-pattern using the newly determined (lower) ink limit. For making
neutral prints with std UC inks, this means relating the LK maximum
to a K percentage of equivalent density. It's a small matter perhaps,
but can't this step--in principal--be done using the same (100%) ink
pattern? Just determine what K-scale value equals the LK (max)
density, and then divide the result by the limit value (i.e., divide
by "limit%/100").

(3) About the new-to-me X-Rite 810 densitometer: it works fine but I
often find the display difficult to read in subdued ambient light. Is
the lack of LCD backighting just reflect (no pun) the 1980's
technology, or does my 810 need some repair (light bulb replaced)? 

Phil