Hyro,
Congratulations on your very good results in the Bulgarian race. Hope to see you downunder some time soon.
You can email me the links to the videoclips and I'll post them here.
About the caster change, the problem is not that people change it very often but they do adjust it to the track they run on, so more options would attract people racing on various surfaces where different caster angles would be required. There is however a simple solution I see without any need for new parts. Just provide a number of holes in the top plate for the inboard balljoints and you're set. This would be even better since I know a lot of top guys race on different tracks so they wouldn't feel restricted.
Chatty Matty, the web based translation is actually surprisingly accurate. I only wish my german translations would work as well as that.