RS-Mach / SSI Roof clips

I've just come inside after spending half-a-freezing-hour outside installing these very nice new roof-clamp wotsits from RS-Mach. The original hardtop clips worked OK, but the don't allow you to clamp the roof down that tightly like the original soft top clips did and until recently the bolts tended to come loose after a while. These new ones are nicely machined with stainless fixings and seem very sturdy compared to the original FEELS ones allowing you to apply a decent amount on tension... apologies for the bad piccy - the camera doesnt seem to like super shiny things!