In reply to NearlyDutchDan:
If you're not already sorted, we used a guide call Tor Berg when out a few weeks ago. He does some work for Jakob, doesn't live in Rjukan but is originally from there. He was excellent; had a days teaching and then took us on a fabulous multi pitch a couple of days later. Really good guy and knows the area v well. His email address is
bergfriluftsliv@gmail.com
but he contacted us through the climb Rjukan Facebook page
https://www.facebook.com/groups/118510158161538/ so might be worth posting on there.