I purchased my first Phantom and it didn't have a controller with it. It's a P330D and not my first drone, I bought a cheapo to learn flying first. My question is what model transmitter will be the best for this unit? I bought it on eBay and it said it was equipped with an aftermarket 5.4 ghz FPV system. I'm not sure if that's still on the drone or not as my knowledge of DJI is lacking right now. I'm looking at an SR6 and a DJ6. What is the difference between the two? And which would be best? Thanks for any and all advice.