Thanks for the positive comments guys. Had time to do a bit more in the last few days, so now we have wheels, a battery, servo for the lifter and wiring.
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I'm using an xt60 plug for the link, although I'm not sure if i like it being near the front, but thats where it has ended up at the moment, maybe see if I can shield it some way.
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Also realised that i also had to squeeze a stand alone BEC in somewhere, as it turns out the servo I'm using draws just under 4A at stall, so more than the one on the botbitz ESC could supply.