from sky beacon FAQ:
Which transponders does the skyBeacon work with?
The skyBeacon will work with any Mode C and Mode S transponder. Due to the unique design and technology of the skyBeacon, there is no need to run any new wiring to the transponder.
Read the hangar docs. Who pays for the roof repair, door maintenance, etc.
I'm the president of a hangar association, feel free to PM any questions too
If he said the hangar is for sale, did you ask for the price? Annual dues? Lease?
In all likelihood, your friendship and the plane partnership are beyond repair.
I'd send him a certified letter saying he has 15 days to send you your half of the purchase price (if you have purchased within the past year and without upgrades, etc) or place the entire plane on the open market...
someone will ask, so it might as well be me: Is the update free to current 540 owners? Will it be necessary for dealer to do the update? Or can owner do via usb stick?