first 6 flights with the rtk went well. flights were 2 sets of 3 back to back. with e30zx. soi far no issues cropped up. waiting on a day to do all six flight batteries back to back. flight times are better than expected avg 20 to just shy of 24 min. I have to keep a eye on the connector head temps are not burning but warmer than the batteries from the h520e running first gen h520 and h480 flight batteries.