P, the wisdom of the banking thing was maybe a little ahead of it's time, BUT...
In another thread I invoked the sacred name of Mr. 27, Randell Webb, and to show how far reaching that wisdom of banking being BAD.
One day we showed up at the track, and out front was Randell smoking a cigarette, and someone asked when he was racing 27, to wit he answers, "I'm racing right now". Meaning he had glued his lane in so well all he did was rubber-band his controller WIDE OPEN, and took a smoke break for 2-3 heats. In those heady days of unlimited gluing, it started becoming real clear that with punchbowl tracks and air control, it all comes down to who can spend the most buying direct from manufacturers and who's in the good old boy club, getting the pick of the PK arms!
There is even a track I know of that used turnbuckles tied to the floor to increase banking, to get faster lap times with less driving. At that point what's the point of racing, let's all just dump out all the cash in our pockets and light the piles on fire and the one that burns the longest wins!
I'm curious as to who moved his car and controller between heats while he was outside smoking.... I'll bet PA, Jim HT, Tony G or one of the Porfirio brothers can tell me, I'm sure that some or all of them were there, what year was this?
I wasn't aware that Dan Miller ever had a Group 27 arm.
As far as turn buckling a track. it is typically done to stabilize a track rather than to increase banking, think about it, with sidewalls installed, just how much banking do you think you could actually crank in without breaking something. They do move around quit a bit though, especially with high speed wing cars so stabilizing them by tying them down does in fact make them a better track to race on. Give it a try and see what you think.