Tamiya 414m2

[T-man]

Hi guys, I'm a old newbie, if it makes sense! I was into my rc racing when I was "younger" now that I've a little more time am back racing! I've got a 414m2 which used old nicads and brushed motors. Now we are in the brushless motor and lipo era I'm struggling with gearing! Anyone got recommendations? The class I'm running in is 17.5 blinky "standard" the tyres are sorex 28r the track is carpet med grip, the track has a long back straight and a twisty in field. Any help would be greatfully received.

Thanks in advance.