Hughs 1.5 have worked great with BB eddies and FT solids. They hold an adjustment very well and are great quality parts. I just didn't need the T&D's / Jesels and the cost. My cam isn't much over .550. I ran Isky and Crane iron rockers for many years without any probs. but I think Hughs were a step up in tuning and overall smoothness when I changed over the rocker assy only at that time.