Well i'm back from Empuria tonight from a long weekend and had a fantastic time!
Anyways, as for the luggage, it is a 20kg limit for checked in baggage which you need to pay 5 pounds for each way or 2.50 if you pay before you get there.
As for the hand luggage, i bought my rig on board with no questions asked. The size of my bag is slighty over the limit and so was the weight. They never asked me about the hand luggage or even checked the weight and dimensions of it.
I have flown 3 times now with rynair and brought my rig as hand luggage and never been questioned on any times.
Hope that helps.