Good idea! Like I didn't know the rounded bell caps needed the chimney with the short upper top piece. I am using the FT KF base successfully with the Ehpro clear tank and top piece. And I like the full clear tank, great for seeing juice and full tank capacity plus lighterWe should all start a list of tried and true kayfun parts that actually are worth stocking up on. Most of the parts I have bought have been great, but there are lots of duds or parts that really don't fit certain KFs.
I know there have been a few, but nothing like "this tank sucks as it isn't threaded", "need to order a smaller chimney too", etc.