Actually depending on what bars you're using and what's a good position for you, probably just 2 x superclamps back to back with a spigot would do the job though you have less flexibility about where the mousemat is positioned.
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Actually depending on what bars you're using and what's a good position for you, probably just 2 x superclamps back to back with a spigot would do the job though you have less flexibility about where the mousemat is positioned.