Honda "rubber mounted" the voltage regulator because shaking the dickens out of a mechanical device like a relay is bad. The solid state stuff (I assume the David Silver unit is solid state) would be less susceptible to problems like that. The other issue you need to worry about is whether it's counting on a ground where it mounts.
It looks to me like it's pretty much a drop in and
NEEDS to be grounded since it only has 2 wires besides the rectifier connector. The factory regulator needs 3 wires, one of which is ground. In other words, if you isolate with rubber mounting, be sure to ground the case.
