Wright,
Tthe Thunderboards have a good reputation, although some say that they are unnecessary.
Mount a Bosch board from Motorrad Elektrik, (not the Wherle brand board) on metal mounts, not the rubber mounts, and they are pretty reliable. Biggest problem is COOLING the board, not vibration.
If you need a board, it's a tossup - finding a Bosch board isn't always easy. But do use the finned metal mounts and extra ground wires for max safety.
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Grant Johnson
Share the Dream!
at:
www.HorizonsUnlimited.com