A: It wants to be wet and you would need a very steady hand for a pretty finish so I would not recommend it even if it fit.
A: No you do not want to use a grinder. It may go better on a wet saw.
A: No, it cannot fit in and work with an angle grinder.
A: Yes. You need to adjust the depth of cut to just kiss the face of the tile and the blade will be slightly more than an 1/8 inch into the groove below the tile resulting in a 3/8 inch radius arc centered an 1/8 inch below your tile but rounding the edge nicely.
A: If your machine allows you to adjust blade level that may help. But as mentioned below do your trials on a scrap piece first.
A: Technically yes, the thickness shouldn't matter because you can't do it in one pass. You will need to use multiple passes taking off small amounts each time. There is a learning curve so you might want to start by using one or more test piece's to get the feel for how it works. You may also need to keep adjusting the blade height to get the full bullnose depth. You can also do it freehand without the table like I did to get it to round over the edge better, just be sure to keep the piece moving without stopping. I used this method to bullnose all the edges in my walk-in shower including pony wall, niches, shelves and about 30 ft. of base board tile and the blade performed very well.
A: I used it on my 10" Harbor Freight along with a block to raise my cutting surface. I had to tweak the spray nozzles to hit the blade correctly since they were set for a thin 10" blade.
A: Works fine in my MK 10" saw. All I have to do is partially unscrew the tang that holds the saw head at the correct height for a 10" blade, rotate the tang 90°, and lower the wheel to the proper height for the bullnose.
A: It worked on my 10 inch Felker. I don't know about any others
A: It should work fine. You will have to adjust the height for the smaller diameter blade. The saw I used was equipped with a 10" blade and it still worked fine.
A: Yes, but you will not be able to close the guard because of the blade's thickness.
A: It will not fit on an Rigid R4031S without spaces to keep the blade from rubbing (destroying) the inside of the saw cover. And you won't be able to close the outer cover once you do have spacers...