AT Boot fit

This Christmas Santa Claus left me with a pair of Garmont Mega Rides.
However anytime I am faced with a footwear sizing decision i am also
inevitably paralyzed with fear at screwing it up somehow. I guess I've been
burned too many times in the past with poor fitting boots that I'm maybe a
little overly paranoid when it comes to fitting. These boots come with the
thermoformable G-Fit liners, and I haven't baked them yet because I'm a
little unsure about the sizing. I've been wearing them around the house for
a pretty fair amount of time over the last couple days. The shells seem to
fit fine. I have about a finger and a half width of room in the heel of the
boot with my toes at the front. With liners my right foot feels pretty
good, length is good, a slight hotspot on the inside of my ankle bone, and a
little bit too much room in the heel. With the buckles locked down its
absolutely impossible for me to squirm my toes to the front of the boot(but
plenty of wiggle room), kicking the steps as hard as I dare (for fear of
breaking the indoor steps (I don't want to wear the boots outside yet),
still leaves me with enough toe clearance on the right side. On the left
side with the liners in I have the same hotspot at the inside of the ankle
bone, a little bit too much room in the heel again, and a couple additional
problems: the width across the ball of my foot feels a little tight, and the
biggest problem is toe room lengthwise. Skiing would ok, but walking
downhill and kicking steps etc, my toes would be hitting the front of the
boot. I replaced the stock insoles with superfeet and that helped a little
(I have high arches and without the extra arch support my feet elongate a
lot when they're weighted). I don't have enough experience with the
thermoformable liners to know. If I bake these liners, I think the ankle
hotspots and the too roomy heels will probably disappear. The big question
is will I be able to eke out enough extra length in the toes of that left
foot? I read the baking guide on telemarktips.com and it talks about
getting extra toe width. What about length? Also, if I go a half size
bigger to 27.5 Garmont's shell is still the same, the only thing that
changes is the liner. Does the liner size really make that much of a
difference with the thermo-flex liners? Anyway, like I said the right boot
feels pretty darn good so I'm not certain I want to change anything size
wise there.

Any advice?

Ryan