I had mine at rec.. but they felt far back to me. If I were to do it again I'd go 2 cm forward from recommended. I think rec is -2.5 cm from core center.. and maybe like 5-6 back from true center of the ski. I wouldn't go past core center though.
Future Orthopaedic Surgeon of NS. Everyone gets a 10% discount with their NS username.. haha.
'Heh Heh ... All Right.' ~Quagmire