I just picked up this Cox Super Scale chassis. It is reportedly 1/40 scale, thus modifiable to 1/43 by shortening a bit.
Designed by Philippe De Lespinay back in the early 70's while he was at Cox. You can see the heritage of this design in the current high dollar TSRF 1/32 and 1/24 RTR chassis.
Per discussions with Philippe these cars were tested exhaustively along with the much improved Cox Super Scale on demand "speed control" double XLCs.
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