Hello Shinobi, and welcome to NSR-WORLD.

Please read the tuning section of the Main Site and search the forum (and for starters read the thread just below this one!) for details of tuning and delimiting the MC21 and MC28. The thread just below this one also includes relevant tuning information.
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Andy.
NSR-WORLD.COM

Please keep all responses to Forum posts on the Forum so that others may benefit.

Please DO NOT PM me for technical advice. My time is precious, and you will probably receive a faster response on the Forum anyway.

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