I am considering the purchase of a First 211 to moor in Christchurch Harbour in the UK.All the designated moorings dry out to some extent.My question is: Can the 211 take to the bottom without too much heel,or can the twin rudders be used to maintain an upright position?There are other French trailer-sailers where the centreboard retracts fully,but none has the sailing ability or the looks of the First 211.The draught of the centreboard in the retracted position is the only problem with this boat.Your help,please........