Only 4.4kg?!?! That's amazing. Well, mine with bigger shocks, heavier batts, heavier motor, heavier shock towers, heavier (longer) chassis only weighs slightly more than 1kg more than yours .
Will be nice to watch your video footage, to see what your truck is capable of.
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