On the subject of hub : urethane ratio, that speed will be very dependent on the surface you're riding. Having less urethane might have its benefits but there's also some pretty important detriments to think about - hub strength and vibrational losses. Let me tell you this - i am losing count the number of hubs I've cracked. Them danny beer 56mm (can't expect much, but just for context) through hydrogen 84mm to matter 110 on a speed skate. Sure I'm pretty tough on my gear but i weigh only 50kg and I don't skate drops. Force follows stiffness and there is only so much a plastic hub can take. Secondly are vibrational losses and you can look to cycling research for more on that - there's plenty on contact patch and rolling resistance but not so much conversation on the vibrational losses that occur in the human using the system - all the energy going into your foot shakes your muscles around, creating heat that is wasted energy when it comes to accelerating you forward. What you might lose pushing a softer wheel you may regain in a smoother ride, meaning for example, you'll have more energy to skate a spot after actually getting to it. "There's no such thing as a free lunch in physics", and there's certainly no such thing as a perfectly smooth city!

I really love the concept from the CS. Hi-Lo-Hi-Lo-Hi is such a cool combo for a 5 wheel frame, the small wheels leading to a lower center of gravity and the wheel base being consistent across the rocker (vs Hi-Lo-Hi-Hi-Hi which has a shorter wheel base in the front and longer in the back). I'd like an 84-72-84-72-84.

Don’t you feel trinity should increase mounting distance with size to reach perfection?

I can't remember, did you compare the Arc to other 5x80 frames like the PR80 from Wizard and how it feels different. I have the Arcs that I enjoy, but wonder how they compare to the 5x80 which I have the opportunity to try, but wonder if that would offer anything different

Ummmm someone try HC EVO with Endless ?