Replying to Checking mounting position of bindings.

i have last years 1080's 181 and want to get a new binding and mounted at centre.
i also got seth vicous 189, (will go for +5) but when i got the binding was given choice of 1 binding they had that would fit ... so to check, S 912 Ti good?

so for each of these skis how do i check the binding has been mounted right in the right place. (last year i think they mounted back when i asked for centre)

thanks.
(thought id seen stuff on this before but couldn't find it with search bar so i'm posting this)