The Mk. 3 isn't working out splendidly, it's really just been sitting under a tarp for the past couple of months. The rear tube has a hole in it too, which is a bummer. Hopefully, in the coming months, I can find two road forks, and try again, the three wheel design was superior in almost every way. Unfortunately, I've got two bikes that need to be built up that take priority from the cartbike. But stay tuned.