1: With the bracket fitted snugly against the headstock drill the 6mm mounting hole
2: Before bolting the bracket on, attached the shockcord between the blade and the bracket
3: Bolt the bracket on, put the disc between the blade and the bracket
4: Drill the 4.5mm hole for the stopper bolt, position the bracket against the headstock as per photo 3, drill hole position as per photo 3
5: Fit the uphaul cord as per photos 4 and 5 below.

The stopper bolt position is very important, position it as in the photo above. Drill a 4.5mm hole so the bolt treads in.