Health issues have meant Vmax forum absence for some time, but caught up with this discussion.
My solution somewhat "off the grid", but for interest.
Unusual opener. Our Max has a sidecar, plus hard luggage panniers (cheapo, but sturdy, waterproof, Pelican copy tool boxes).
Anyway, the Goldwing battery fits neatly in one box leaving room for various items when touring. Normal battery space not wasted prov8ding room for anti theft device. Battery easily accessible for maintenance and battery tender connection.
Final thought. My easily accessible battery means no problem to connect all manner of stuff including a booster should the battery require encouragement. This leaves a thought. Should you be out on the road with a dead, or weak battery, how would you provide an externally sourced boost ? On the face of it a problem with access requiring disconnecting ignition coils. Or am I missing something ?