I have a P2V that orginally had the 920 kv motors and I upgraded to the 960 kv motors and I went from 21 min flight times to 19 min. I have all the proper equipment ESC 2.1 that I used for the 2312 motors and I bought T Motor 2214 V3 motors to try to get back those min. My question is I solder the last motors into the leftover solder on the contact points for the previous motors is that the cause for my loss of flight time. Should I heat up and remove the excess solder from the Esc's and the main board? Before I put the T Motors on?