Re:
Sorry I'm late to the party chaps, do love a good headshok/lefty thread
Between me and the GF we've got 3 fattys and currently 2 leftys, but then I'm fortunate enough to have tony at thumbprint just a short ride down the road ;-)
Definitely worth persevering to get yours fixed or find one in good condition, when serviced and fettle they are great forks for short travel applications, very smooth, very adjustable and tracking is unmatched.
The later models are actually less reliable than some of the older ones, the sweet spot is mid 00's models, Super and Ultra (alu steerer/slider model) that have been well looked after.
Most of the nternals are swappable between forks, the damper is a removable unit and can be ported to different telescopes so upgrades are an option.
It's almost worth the spend on a full rebuild and sort on a duffer as you'll end up with a decent light weight fork in tip top condition for about the same money as buying one in the same condition, and Tony normally has loads of spares to sort whatever you need at sensible prices
Sadly my best fatty got stolen while it was on myold F900, it was a Tony special, alu steerer Ultra with custom tuned damper and 70mm travel, a smidgeover 2.5lbs and stiffer than any SID ;-)
I'm a big fan of letlftys if you need more travel, but for short travel uses fatty is the way forward!