You want a rocker plate for your kickr core but don't want to pony up. Tennis ball rockers

You don't have the patience to desire to make or buy a decent rocker plate for your kickr core? Just print this instead! Is it as good as a real rocker plate? Hell no! Does it work? Kinda! It feels imbalanced because the center line of the bike doesn't put you in the middle of the tennis balls. But have I taken them off and gotten a real rocker yet? No! I'm lazy and this kinda works.  Hot tip, when knocking them on with a mallet, don't hit the middle of the circle, it will bust it out. just tap