I do not know the answer to your question, but consider this...
If you use an add-on fuse box (
like this one) and eliminate your in-line fuses, then you never have to worry about taking the tupperware off to check/change your fuses. A power relay connects the block to the battery, and the coil lead is tied into the rider seat heater wire. This turns the entire fuse box off and on in synch with the ignition switch.
I have my Zumo, Valentine One, Autocom, MotoLights, trailer relays, and more connected in this way and I would not have it any other way.