Ha, as i was typing that i considered the possibility your car might be a diesel, but decided otherwise….go figure! But ya, as the others have said, there is also diesel stabilizers, but diesel does have a longer life span. Putting a stabilizer in wont hurt anything, so personally, id put it in anyways just to be safe….

Yeah, for the most part. The other commenter is right about that battery, tho. Disconnecting the battery will help, but depending on the type and age of the battery (and temperatures in the storage area) the battery might still not last. Trickle charger might be ideal here, even just a little solar panel for it.

Gas in the tank is another thing. There might be conflicting opinions on how best to handle this, but- I would run the tank as empty as practical, then fill it up completely (so you have all fresh gas) and add a stabilizer. Most stabilizers will keep the gas good for 1-2 years. Best to make sure its an Ethanol stabilizer (like Sta-Bil 360), unless you put pure gas in. Then make sure to drive it a little so the stabilized gas gets into the whole fuel system.

Otherwise, give it a good wash and then a cover for it if you can if it’ll be outside in the elements. Depending on the storage environment, things could still start growing on it, inside and out.

Yup, that’s it. I remember now being told it was ice crystals or water droplets or something that caused the effect, like that article explains

There’s obviously some fancy science term for that, but we had something “less smart” we used to call it as kids. There was some “old ways” thing we were taught that depending on how many stars were caught in that halo was how many days until the next rain…. Maybe someone else will shed some better info, but your comment reminded me of that!

Oh, right, didnt think about it trying to roll when replacing the cups. Maybe try a make-shift wheel chock with some towels or wood wedge, really anything you could jam under the other wheels.

Are you sure the wheels will even damage the floor? Is this a stage, like normal black stage deck? If so, you’ll be fine. If not, and the hardwood is like a really nice finish or dents/scratches easily then there’s likely to be a risk. How was the piano brought in?

I didnt think to ask if the castors were plastic or metal? If they are plastic, you’ll be good. I was thinking about the wide metal castors ive seen a lot. If they are metal, unfortunately i dont have any perfect answers- you’ll have to get creative, i guess. Cardboard, scrap carpet pieces, basically anything to buffer under the castor. But nothing you’d want to reuse ‘cause the castors might damage your makeshift padding.

Technically yes, if you can lift each corner of the piano high enough AND kick the cup out all by yourself. Lift with your legs, not your back!

The real challenge would be reversing this operation- lift and sliding cup back in place with a foot. I worked for a piano shop long ago and this was basically the same method we would use even to completely remove legs to tilt them up onto the sleds to put on trucks. I think we could do it with just 2 people. Also make sure the castors wont damage the floor…pianos aint light, and those metal castors arent forgiving!

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