Well here's a tip from someone who has soldered more then my share of heavy gauge wires to Deans. Like the HK packs now coming with 8 gauge wire on them.
As stated good heat is a must, I only use a 40 watt chisel pen, and clean surfaces, and good flux.

I have a pair of Deans connectors with about 6" of 10 gauge wire soldered to the tabs, hanging loose.
When I solder up a Deans I use one of my heat sink set ups plugged into it to help keep the heat from melting the plastic.

Anyhow, the tip. After tinning the Deans and wire, take a Dremel with a thin cut off wheel, and notch the wire so one half slips over and under the Deans tab.
You'll have wire contact on top/bottom/end of the tab. Touch the bottom of the wire and not more then 2 seconds and you will have a rock solid bond.


If you have problems from too much heat too long on the Deans and deforming the plastic, there are couplers out there that will help. Use the big heat on the wire to coupler, then very little is needed to solder the coupler to the Deans.

http://www.rcdude.com/servlet/the-12...ersdsh-/Detail



Or switch to the EC3 or EC5 connectors dependent on you amp load. Super simple. Solder your wires to the terminals, and then after they cool, insert them into the connector body.
Lot of electric flyers are switching to these for that reason.