First, the snake you posted looks nothing like a JMG axanthic and could not be more genetically distant from eachother.

Your axanthic kennerlyi are very nice indeed but it is a recessively inherited trait. The JMG axanthics are a co-dominant morph that produces a super form. Again, your axanthic kennerlyi are awesome but those and the snake you posted will never produce a snake that looks like this.