MTL Z: new vs. old -- speed difference?

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Info from Rob of http://www.ztrackcenter.com/ :

The F7s is a 1980s design. The GP35 is a 2005 design. A lot has changed in those 25 years! The biggest difference is the coreless motor the GP35 uses. It is nice and quiet. Very different from the motor the F7 uses.
 
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