I've done the rittet twice. Second time I made my merketid, by 7 seconds. Did you guys make your merketid? Awseome fun. still makes me dizzy thinking about it 6 years later. I see you did that too, so you going to go for the run as well and be a Birkerbeiner? never done the ski. Did the Skarverennet though which was 'only' 40km. You can skate on that one, if you are allowed to skate on the Birker then definatley practice that, even on track skis it is possible if a good flat course and it soooo much faster. Train your arms as well, pull on a piece of rope with weights in the gym. repeat for 4 hours. Good luck!
Ah cool - sadly I'd had an operation 2 weeks before the MTB event and was shooting it for a forthcoming magazine article so with all the stops didn't get the merketid - and Paul rode it on a single freewheel which cost him a lot of time !
The XC is all classic so been double poling on roller skis as training !