Requesting Help for Ultimate Symbiote Mesh.

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So I am attempting to create a new symbiote mesh using the pieces and animations from TJ plastic man, Mr. Fantastic, adn the male symbiote mesh. I believe I have the nodes set up right and the key frames are compatible but when I saved the keys in the keyframe editor it evaporated all of the keyframes?  I was going ot try and ask for help with getting the Mr. Fantastic arm stretch ranged animations on the plastic man mesh anyway, I was wondering if anyone was interested in helping me get these keyframes set?

This is what I have so far:





This isn't exactly what I wanted.  I was hoping to combine the three meshs and keyframes to create a super-stretch/symbiote mesh If anyone is interested or wanted to help please let me know.