Man what an undertaking!!!! I really know because I have done it twice, once with cherry and once with oak. I did use edge grain for all of mine because of wood movement concerns.
Do not know why I did not see this thread earlier or I would have tried to pass on a few things learned the hard. Most standard tops have 45 degree angles cut to accommodate 90 degree turns. I see you solved this the same way I did.
Unless you have more money than sense and can buy any and every tool you want you are going to have to improvise at times and I think you have done a great job in doing this. I really think you have all of your major problems solved but if you run into anything that causes you concern please PM me and maybe I have run into the same thing and can help out.
I did run into a problem with a crack in the wood after a couple of years. This was actually a bathroom counter top. I made a jig for my plunge router and cut out the cracked area. Squared the ends with a chisel and then found a piece with matching grain. Now I can hardly find the piece.
You will get some minor bumps and bruises along the way, particularly around the stove, but my wife thinks they just add character. I saw the cherry ones I did 15 years ago and they still look great. You will be pleasantly surprise at how well they hold up.
One safety note:Tuck in your shirt when using the jointer or other moving blades or bits. Unless I missed it I am surprised someone else did not bring this up.
In case I did not mention it you are really doing a great job!!!!!!!!!!!!