I'm buying a Cover for access to sail-feeder and tack attachment for Selden In-Mast furler for 2007 H33. There are 2 sizes, small 57 x 126mm and the large 72 x 207mm. Not sure which fits the H33 mast. Short of me going to the boat to check, could anyone here advise? Thanks. 
http://www.getrigged.co.uk/furling-mast-cover-plates-364-c.asp
http://www.getrigged.co.uk/furling-mast-cover-plates-364-c.asp