wrote:
I have a pair of second hand ski's(1080s). They have S810 bindings that
have been remounted for a smalled boot size. I can see the old filled
holes just at the back of the bindings. I wich to remount the bindings
to the original position for a larger boot. I intend to get this done
at a ski shop. However - is this possible? how long does it take?


It's possible. A good shop can mount and test in less than 1/2 hour IMO
IF they are not busy.

Problems:
Drilling out epoxied plugs may be difficult - the shop should use a
drill press; usually they freehand using a jig, and may not have a drill
press - the shop can advise you.
A binding is mounted to fit your boot, not to specific holes. Maybe the
holes are in the right place, maybe not - the shop can advise you.
If new holes are needed, they might be too close to existing holes
(weakening the ski) and remounting not recommended - the shop can advise
you.
The binding may not be indemnified any longer - if not, the shop won't
touch them - but they can advise you.

In other words, take them to your shop and ask them, not us - the shop
can advise you.