Oh yea, they have new versions out besides there frst one they came out with. There getting into rollers now.
I first started useing them to slide in a bigger cam to check out how it would be/act. Not being able to just drop cash on a set of gears or tire size adjustment or other parts to compliment the cam, the Rhodes lifters would help down low to mello the cam out enuff to stay with the (then) current configuration.
Though with what the OP has for a combo, I'd just run a smaller cam.