you'll have no problem given all the miles you put in your Newtons!
I tried my Sense Mantras for the first time earlier this week and I definitely felt the difference that a 6mm drop makes to the ride. I can see how the lightweight feel could get addictive.
Crazy lightweight!
Cramps, you're right there. I was much more sore (calfs) after breaking in a new pair of the Newtons last week than on the Senses yesterday.
I love the Ultras! Now that my ankle is feeling more stable, I hope to get out on them more.