I could have sworn I was talking to someone about 18 months back about a system using the same sort of RF tags shops use for security. The loop would be pricy (AMB/Mylaps type money) but the 'PT' would cost literally pence.
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Yz4 - Yz2
DEX210 - Cobra 4210- DEX410
RC10 Team - Manta Ray - RC10T
Mini Trophy - Blizzard - Wheely King
Tz4 - GT24B
BMRCC
Emergency back-up race controller
(but only if nobody better is available)
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