There are two popular ones I know of, the Rob Cosman "AdjustStar" and the Reed adjuster with a much finer thread pitch. It's probably not necessary if you're used to the regular adjustment wheels but I wanted to try it out on a "low value" plane and it's a neat gizmo. I can see it being useful on a smoother but not on a typical jack/fore or jointer plane. I'm not sure if you follow
GR Woodworking but he uses a Clifton 4 1/2 and it made me really want a heavy smoother (without the Clifton price tag obviously) and some kind brits on the Stanley FB group weighed their 4 1/2s and confirmed the earlier (thick cheek) 4 1/2s were indeed heavier than the US versions or later English versions but not quite as heavy as the 4 1/2H (which are over 5 lbs I think). Is heavy good? That's also a point of debate, but it does feel like you have a little better shot at plowing through knots or those pesky sudden grain reversals and an amateur like me is not doing enough woodworking to be super picky about my lumber or I'm using trash like branchwood or forks I milled myself.