So I kinda fell off the map for a while here. I need to replace 1-2 motors on my FC40... for reasons we wont talk about. >.>.....<.<.....>.< My drone drifts when I it should just hover. one of the motors threading is a bit messed up and causes a little wobble. so im wondering if i should just pick up stock motors or try and find an upgrade/ aftermarket motors for it. im not looking to break the bank here and kinda want to boost performance a little . also any other general upgrades you can suggest would be cool. prop, or electrical. kinda wana keep it under 100 as this is an older model and i want to limit the amount i invest into it, as it can get expensive fast.