Regarding maintainence on youre X10 drive train wise when build if from kit status you shouldnt have no issues or have to rebuild for a long tome if its done correctly, with the build manual there is loads of hints and tips everywhere from the team.. ! im sure Northy will back me up on this point
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the X11 upgrade parts are in stock for youre X10
.. check out the pimpy blueness LOL
Garry