... you might try a Go competition Pro conrod for the Cobra X2. They are way cheaper and will not wear out the brushing like the Axe rods do.(both new and old model.)
If you use it in the Mamba X1, you have to grind a little to make it fit with the piston top.
The Novarossie R7 will also fit.
http://www.amainhobbies.com/product_...eviews_id/7427
Axe conrods are just to weak.