RE: An end to tuning?
PA
There are states that have arrow requirements that the 6" arrow does not meet. Arrow rullings are established to TRY to insure an ethical kill. Most people do not know of this arrow or it's effectiveness which by the way is more lethal than a standard BH tipped arrow.
As far as the bow was concerned, it was made illegal in Iowa until the commisssioners got a hold of one and realized that it had the same primitive speed as all other bows but was MUCH safer to shoot than all other bows simply because the arrows were held captive inside the tubular rest until shot. They immediately changed the law back to allow it.
It had a level nock travel cam and no nocking points at all and the tubular rest eliminated any torque and archer's paradox.