The JR-TBB04-BK aluminum servo stay is an aftermarket component for TAMIYA BB-01 (BBX) chassis owners who want a firmer mounting platform for their servo. It locates in the stock servo position and provides a solid connection between the servo and front structure to help maintain alignment under load.
Fitting is simple on BB-01 (BBX) frames using the chassis' original fastenings. Verify spline alignment of the servo prior to final tightening and do not overtighten to avoid damaging plastic threads. The alloy body reduces local flex versus the factory plastic stay, though you should check servo/horn clearance before completing installation.
From a setup standpoint, the reduced compliance helps preserve steering geometry, which can make iterative tuning of toe and ackermann more consistent. Remember this is a scale upgrade part intended to aid chassis setup rather than replace primary control hardware.
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