How to make a mower deck run in reverse

Jon,

The deck would leave thin spindly grass uncut as the curved trailing edge of the blade knocked in down and passed over it.  Quite often I would have to mow bits twice.
I'm hoping the quality of the cut will improve significantly as the deck is a finishing deck designed to leave a good finish.
Also I won't have to wander around at the end looking for the blade that fell off during the mow.  Then I need to find the nut and washers or source new ones.
Lastly I won't need to weld steel to the side of the blade to engage around the spindle.  If I didn't do this and hit a clod of dirt the blade would loosen the spindle nut and lose drive then unscrew the nut and there goes the blade.
I have a set of unused blades from Caroni for the deck and once I'm happy it all works OK I'll swap them in and see how it goes.