Fitting Markins TS-327 spikes to a Gitzo 1325 2

I recently purcahsed a set of Markins TS-327 titanium spikes to fit my Gitzo 1325 tripod. The only trouble was they came completely devoid of instructions on how to fit. The rubber pad which the 1325 has by default seemd absolutely impossible to remove. Various options on how to get the foot off seem to ...