Some years back when I started tuning my springers, a few of us got our heads together,thanks mainly to the BBS and the Springer bash, sharing ideas and techniques and tuning seemed to come on leaps and bounds with new approaches/ developments happening fairly often (reduced cylinder , skirtless pistons, new ways of sealing etc )
All I am seeing now seems to be old stuff rehashed ,ie buttoning gliding, shorter strokes or spring kits, most of which while being well engineered are mostly copying the venom work from the past.
I am constantly changing modifying and testing variations of my tunes most of which doesn't improve things and gets binned .
So has spring piston tuning reached its conclusion , or is there more to come ?

Posted elsewhere.