I think i'll try this with Kat sometime. How much faster are you than Minna?
Well, she was 25 sec faster than me from start to #3 ;/
I guess I am about 1 min/km faster at the moment. So 2 minutes was a bit too safe, she could have started 1min after me. So I'd have had time for 30 sec mistake at each first control.
To make it hard, just get a Troeng and use 1 min interval....