Hi, my first post here on the forums, I have a syma x5sw, cheerson cx-30w and my favourite the hubsan x4 h107d. Wanted to ask if anyone knows how do I switch my hubsan x4 transmitter to mode 2? Been practising mode 2 on the big syma but can't seem to find any reference in the x4 manual about switching. Just completed a wide angle lens mod , can't wait for glues to set for the first tryout. Also another question is a 500mah battery the biggest capacity batt we can get that will still fit inside the body shell? I've used a few of my 850mah batts just strapped under the body but of course this screws with the handling/performance.