Maybe I can help with #2, 3 and 4.

#2: A flush mount sink does not need a zero radius, in fact, it's difficult (nearly impossible?) for a fabricator to get 90-degree corners in a sink cut-out. The roundier the sink, the happier your fabricator will be, but they can do nearly 90-degrees when called for. Mine is.

#3: A 10" deep sink in a standard sink cabinet (30" sounds right) with a standard garbage disposal underneath fits just fine. Not to worry. It's nice to have more space under there for storage, but isn't necessary for other reasons.

#4: In general, sinks come with a plug/strainer/drain thingie. You don't need to go find one separately.

Just about #3: I have to respectfully disagree with Suzannesl. It all depends on your plumbing setup. What is important is where the plumbing outlet is located under your sink, and taking into account how deep your sink is.

So, what you want is for the outlet of the disposal--i.e. where the disposal drains into your plumbing to leave the house--to be higher than the plumbing under your sink that takes the water out of your house. It's just about gravity: if your plumbing outlet is located higher than the disposal's outlet, the disposal may not be able to drain properly. So go online and look at the specs of the disposal you are considering, note where the outlet is located, add the 10" depth of your sink plus an inch of counter top if you are undermounting your sink (not sure what "flush undermount" is? I thought a sink is either undermounted, OR is flush with the counter). Look under your sink and see where the plumbing outlet is in the wall, and do the math.

If you find your plumbing outlet is too high, you can do two things - either get the Insinkerator Evolution Compact which is a smaller 3/4 hp disposal, or have your plumber move the plumbing outlet down a bit. That can be an easy job or a hard job depending on your house's set-up. So ask your plumber to have a look. I have a very large 1 hp batch feed disposal, but it fit fine with my plumbing under my sink. Other homes might be different.

Here is a link that might be useful: Insinkerator Evolution Compact 3/4 hp Disposer

shannonplus2 - flushmount just means the sides of the sink are flush with the granite above, so not positive or negative reveal, but flush.

homeblessings - shannon has a point. I was basing my answer on my sink set up. My house was built in 1971. When we remodeled, we installed a 10" deep sink and reused the same Insinkerator and didn't need to change any plumbing. Maybe it depends on when your house was built and what was "standard" then. You might want to check with a plumber.

>shannonplus2 - flushmount just means the sides of the sink are flush with the granite above, so not positive or negative reveal, but flush.

I thought that was a neutral reveal? I always thought flushmount was an overmount sink faired into the countertop so it made a smooth surface to sweep the crumbs over. Have I been wrong all this time? I'd like to know, if so.

flush-I was referring to a neutral reveal in my original post. My fabricator calls it flush.

Thanks for all the info so far. Anyone have an answer to #1.

I'm still confused about what to do for a drain. Lots of sinks I've seen come with just a hole, and I've seen a few that come with some type of drain/strainer, but in the reviews people said they didn't use it because of the garbage disposal. Does that mean they just hooked the garbage disposal up to the hole somehow or did they install something else in that space?

Yes, if you have a garbage disposal, you use the flange for that instead of a sink strainer.