Hi Dan.
My P275 #53 "Sophia", had a Facnor furling system and for the past 2 or 3 years it was slowly giving up the ghost.
As it was an old one, parts from Facnor were no longer available and Eurospars in Plymouth were to only supplier of older parts, so I needed to replace the drum where the bearings had finally degraded and failed...... to my utter shock the replacement drum was over £700.00
Needless to say I wasnt going down that root ! (complete system would of been £2200.00). Long story short I opted for the Plastimo 609 T (twin groove). I also fitted the older version 608t on my SS26 "Cleo" and had 10 seasons on her before I sold her, again completely maintenance free.
The bolt rope for the twin is smaller than the single hence why I went for T as my sails would fit.
I have had 2 seasons with it and it has been Fab, trouble and maintenance free. I would recommend it , I had to buy an extra piece of foil as the purchace pack is a little short for the 275 rig. so check the length in the pack and measure your forestay.
Cheers
Peter Lowry