Mmm....tricky one that, young Craig.
On the one hand there's that old adage, "if it ain't broke, don't fix it", and all that. Maybe, maybe, give it a thorough workout in a variety of scenarios and see how you feel re accuracy / hold sensitivity.
But, then, simply fitting a lighter top hat does seem to improve the cycle significantly, although (especially with the HC) you'll need to up the preload a fair bit.
![Old Wink](images/smilies/wink.gif)
Gives you the opportunity to check, polish and re-lube, too.
Or, having seen how impressed you've been with Nick's, Charlie's and Jon's reduced bore wonders, were you considering something a little more "involved"?
![Old Grin](images/smilies/biggrin.gif)