Recently, by far the best money I've spent is on Gardiner Xtreme brushes. I predicted back in January after first using one that these will be the future for WFP users, I stick by that!
What a difference they make!
Will not get to use my Xtreme pole untill tomorrow (so can't really include it now)
Wagtail flippers. SUPERB innovation for trad cleaning (although the standard yellow pad is rubbish) again, super fast, super easy!
They are the more recent ones above.
Also-
SLX25
SL-57
Carbon goosnecks & quick release ends
Digital Varistream
Second DI vessel (stopped throwing good resin away 7 years ago)