Fried the great HV110!!!

What were you running that in and with what motor? The HV110 is a nice controller and will handle high voltage, but it's current draw rating isn't that impressive. I believe that it is only rated to 110A continuous and I'll bet that the max current handling isn't much more than that, with this particular controller. The application for which this controller was designed will hit over 100A but the spikes aren't there like they are when used in a truck or car. Even the MM will handle up to 300A spikes, IIRC and so will the Quark.

Were you using motor braking or did you have mechanical brakes?