pictures coming soon
Charlie,
I think(and I may well be wrong)that the "Chevron" brush style refers to bristles spiraled towards the suction inlet. In this respect, the wood core Convertible agitator would be a chevron style, as well as I believe the agitator on the Airway's old Douglas made powernozzle.
I like the bojack wood core brush for a couple of reasons. One its sealed bearings are quieter than Hoovers, two it really digs into the carpet, three it smooths out and quiets a noisy machine. I highly recommend this brushroll for anyone with the plastic machines, it makes a HUGE difference.
I don't recommend it for the older Convertibles, too much drag on the motor.
I built the two Convertibles I use to suit my needs, namely tons of dog hair and 1/2 inch thick plush carpeting. One machine is the original two position height adjuster, the other the 4 position. The differences are there.
Airway: Greg its a really nice machine, and I am very happy with it. My main uses for it are weekly to sweep my kitchen floor and get Jack's hair off the furniture. I've tried all the combos, uprights with tools, Hoover portapowers, Hoover Telios, vintage canisters, and my Kirby... all left me less than satisfied. The Airway is easy to use, light and not noisy. It has one fault, a rather powerful exhaust stream, which could be likened to standing behind a 747's engine running full speed.
In all seriousness, for its price, I love my Airway, it will be around for a long time, and it works well.
Its a much better value than some brightly colored plastic machines on the market today!!!