as for power i say lpf is better then the qspark but the q spark is smaller and with a 7.5t u wont want turbo and as for turbo on lpf u need the lcd programmer to update it and then u will get about 60dec of turbo timing more then i think u get in the qspark
if it was me lpf/hobbywing or orca vtc pro (i run a orca pro in mid motor on a 22 and full size lipo also bit tight)
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