The rocker stands have been moved on the trick flow heads for better geometry. I believe Mike at b3 was involved in this, they now require minimal correction but stock rockers do not work, I mocked up a set of 273 adjustables and it was ugly. If wanting a good rocker on a budget the good news is mancini roller rockers made by harland sharp had really nice geometry and they will sell them as singles very reasonably in 1.5 or 1.6.
