How can give me details like diameter and distance, measurement where the posion for this 4 holes(each side) for the plastic rings has to be?
Looking forawrd to your answers!
Thanks in front!
431dp

If you do not have the holes your boat is of an older type. You have the air inlets via the very nice looking aluminum covers beneath the side windows. I strongly recommend you NOT to install the new side holes. The aluminum inlets are the original and they were later replaced by the side holes.

Hi Björn,
thanks for your information!
Regards
Rolf