You need brackets for the front head (Mallory Metals, about 5" of 1 1/2" stainless angle, and to fit where the steering damper goes (from a piece of 1/4" ally plate about 4" square), and a Kawasaki type damper. I believe Tony used my bracket designs (which are not not unlike Reg Bolton's designs in either FYO or ATY but easier to make). I probably have sketches of all the bits, so just ask. The biggest single advantage is that tank-slappers need to be stopped the moment (or even before!) they start, and that's what hydraulic dampers do. No worries: you can stress about your mortgage, and forget tank-slappers. One can spend a fortune on seriously expensive ones, which are no more effective than the generic Kaw one. The whole jing-bang should cost no more than about £50. Something important: hydraulic steering dampers are not activated by movement, but by SPEED of movement, exactly like door-closers, so getting zero-slack ones which bite immediately at low speeds might make you feel good, if (or probably because...) £300 worse off, but, practically, are no better than the £35 Kaw unit.
I'll need your personal email.