KB's in a 318 with No Re-balance

I recall a 360 build by some magazine. It was some time ago. They used the KB107'S and did not balance rotating assembly. It was a cheap type build. They ran car to get some times after break was done. And claimed that engine ran surprisingly smooth @ all rpm's.
This is something i have been curious about. Kinda what got the whole process started. Me and nm9stheham was talking about budget builds and how necessary rebalancing was if it was just a low performance, low rpm street car. Obviously in a race car where your turning high rpms constantly its gonna be crucial that everything is done precisely. But in low performance builds where is good enough? So he started plotting out some homemade balance stuff and this is what he came up with. I think its great. Nm9stheham did a great job with this!