This is my Kopaqi B2 wing - I love this wing as its so stable and easy to fly, so it's become my favourite test model for testing new motor and prop setups. On this day I have decided to fit a 2216 2000kv brushless motor running an APC 7x5 prop. Well it was definitely faster and that faster spinning prop made a lot more noise, much higher current draw comes with a setup like this, so the flight time does suffer as a consequence. So if your happy with just over 5 min flights its ok... I do prefer longer flights myself, or at least a couple of flights per battery, but still it was great fun !! Always learning.. :-)