I'm so very close to going in on this even though I just ordered a retail model. What would pique my interest even more than an extension though would me machined end-caps rather than the current plastic ones. Even if it added $5 to the total.
I way ahead of ya, ruet....already thought of that!
Their prototype model has anodized aluminum caps, but there again, have to get enough interest to meet MOQ's in order to request custom upgrades.
Lot's going on and it's gonna take time.