I've fitted one and it appears to allow me to run 26/87. Not tried higher than that yet.
Is it worth it? Well if like me you prefer 10.5t motors, massive gearing and a lot of timing advance instead of a 5.5t motor, yes.
If you are running 6.5t or 7.5t motors I doubt it is worth it as you can get a decent range from the standard mount with 87,84 and 81 spurs.
I also think the standard FT mount has better cooling too.
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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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