Barb, I am so happy for you. No new lesions, and a good clinical exam. That's wonderful.
I had the same report as you in March and it made me happy too.

I can't walk on my heels very well either, I must practice, practice makes almost perfect.
I fall backward if trying to walk on my heels. But I can stand with my feet together and close my eyes and not twitch, get a head tremor, or fall over anymore.
When I am tired, my left leg drags or swings out. Not foot drop either, just it gets wacky when I am fatigued. I know it's nap time then.
My calves get spasticity after walking, because I don't do that too much other than in the house. One store and I am done in. But I have to get out sometime.
I hope your ins comes through for you for Ampyra. My ins says, no new drug for 1 year out of clinical trials. I hope the co-pay is not high for you. I haven't heard much about the drug or it's cost.