After considering my inability to stay upright, and general clumsyness when it comes to dropping or knocking my stilts, I decided to take more extreme action that just using reels and reels of duct tape.
I would like to thank BIRT for his post in March which gave me all the inspiration and help I needed, and also KIWI's excellent pics of his similar mods.
1 x Chunky 26" bike tyre from local bike shop
2 x 99p laces from JJB sports
A tough pair of scissors and a standard 2 hole paper hole punch.
Using the instructions from the link BIRT put up took me a couple of hours to get it done one evening.