how to edit vmdl_c file?

AM a newbie of Dota2 modding trying to replace base AXE animation to new ti9_jungle_axe but failed in public game is run_haste animation of ti9_jungle_axe, not normal run.

and I have no idea of edit vmdl_c file. I can open it in workshop tools, but unable to edit it.

anyone can help me?

Thanks in advance

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