i have the same skis that i got last year. i mounted them at "standard" but I wish i had of mounted them at "modern" which is still like 2 cm back. THey are sweet for cruising but i wish i had a longer tail for the park. You can see how long the tips look in this pic- makes it hard to butterhttp://www.newschoolers.com/web/content/pictures/id/144191/
I have my 181 FS WRS's at Exactly true center. They're absolutely wonderful switch, however when I get into some pow or chopped up snow I need to lean back a whole bunch to keep the tips up. I'd recommend 1-3cm back from true center for some better performance everywhere.
"Everybody's gotta live, And Everybody's gonna die"