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01.19.2008, 01:08 AM
Single will pretty much always be more efficient, lighter, simpler, and more cost effective. The 7XL on 4s might run a bit hot and also require a fan on the MM, but otherwise should work pretty well.
SH Z-Car, Custom Crawler, 8s Savage, 12s XTM XLB 1/7 buggy, 4wd 4-link rear/IFS Pro4 truck, Custom Hyper 10 Short Course, Belt-Drive Mammoth ST 1/8 truggy, 4s 17.5 MM Pro HPI Blitz
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