Just install my castle mamba 8s combo with the 1520-1650kv motor. Purchased the castle b-link so I can program esc trough my phone. So I linked up and programmed my settings a found out that I had no throttle signal WTF. I tried everything and gave up. Brought to my local rc guy, he tried everything to no avail, so I left it with him and he'll call castle the next day. The next day he text me it was fixed. Castle guy thinks I got a texted or call when I was programming and corrupted the esc. I don't no what they did to fix it but my local guy said they did a bunch of stuff that he can't remember. Castle said to avoid this from happening again is to put your phone in airplane mode. Just thought I let you guys know.