I have a package of them, but I decided to go with XT150s instead. I got the RC Pro Plus connectors from Amain Hobbies.

I think you will like the RC Pro Plus connectors. I installed them on a Protos V2 Max I built for a friend a while back. They are easy to install, and when you plug them in, they click into place. You can hear them, and feel them lock in. So there is no question that they are plugged in properly.

https://www.amainhobbies.com/rcproplus/b843

 

Helidirect & RCJAPAN also sell them.
Last lot I got from RC Japan, though last I checked the Aussie dollar is now worse on the yen, so it may be cheaper from US now.

Good connector, I'm using the S7's, but am now also thinking about changing all the castle connectors on my smaller helis to S6 connectors after being happy with the S7's on my 14s helis.

 

Thanks for the replys @Geena & @ChopsyWA

 

I run the S6's on my E7SE and they shiz all over the EC5's I was using previously. Like Chopsy I got mine at RCJAPAN

The S versions are more versatile than the D's IMO if you're likely to use your packs for more than one heli or if you might use them as single 6S or series them into a 12S pack.

 

@MadBird Thanks for your info, I hadn't even thought about using the single ones. Something else for me to think about.