Would you be able to weigh a couple 50# line sets against a 30# of equal length? Like at least 2 shorter sets? I'm wondering at what length do the benefits of 50# line start to not matter.
I'm not too concerned about the frame weight, though I do appreciate you doing the numbers! I tried the 4 wrap a few times in very light wind (2-5mph), and it didn't really "feel" heavy, though it felt sluggish to my inputs. And i noticed that not having flex in the frame was holding me back some from tricking more often, as the sail seemed more difficult to load up. Maybe because the kite was over-sheeting the wind because the stiff frame was keeping the sail too taught? I didn't seem to lose too much distance on my floats, but they felt really twitchy with the 4 wrap.
I'm sure the Race frame won't be difficult to fly in light wind, and will have faaarrrr more flex than the 4 or even 3 wrap, but I'm interested to do my own live comparison against the 2 wrap for sure!
My comment was regarding Windpoacher's post about set up for light wind: Here my point is, I believe that a RR frame being about 20% heavier than a 2 wrap, will be of no help in a light wind setup compared to a 2 wrap. They (RR) might not be difficult to fly, but not easier either .