Probably a stupid question but had different responses from people.
All line skis have a midsole mark and then a recommended stance. I assumed the midsole mark 'was' the recommended stance mounting position. skis.com replied to me saying that the recommended stance was relative to the midsole. For example on the chronics -40mm was 40mm back from the midsole (seems way back 60mm from center), however the local shop said that the midsole IS the recommended stance (and is 40mm back from center).
id go with the shop but just wanted to make sure...