Hi Ron,
Thanks for an excellent report on 5307. It shows just what can be done with a really fine observing technique. You've done a great job of picking out the inner details of the PN that a more rushed observation might have missed. It really is worth taking the time to look at some objects (PN's in particular) with a variety of eyepieces with both O-III and UHC filters. It also points out the desirability of having both O-III and UHC for visual observers of PN's and other nebulae.
Paul.