The Tamiya 51759 TRF421X aluminium lower deck is supplied as a single machined plate intended as a direct replacement for the TRF421X chassis platform. It can replace the original lower deck on TRF421X (Item 42391) or be adopted as an upgrade when fitting the TRF421 (Item 42384) chassis.
Note that converting a TRF421 requires the compatible motor mount to form the correct assembly with this lower deck. The motor mount is not included in the lower deck package as listed in the source information.
Use the 51759 deck for like-for-like replacements on TRF421X or as the aluminium upgrade when converting TRF421, ensuring the matched motor mount is used where required.
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