Need help customizing and/or disassembling Marvel legends hands

Posted in Custom Workstation

Hello, forgive me if this question has been answered somewhere, I can't find it. the closest is about making the fingers jointed. I basically joined to ask this question (and found other reasons it was worth it).
My question: how do you split the seam of the 6 inch Marvel Legends hands? Is it just the labor-intensive scalpel passes, or is there a faster method?
I have plans I want to put into practice, specifically about the Juggernaut series' Wolverine & Rogue, and Old Man Logan, with possible future/past applications. In regards to Rogue, I want to make both hands removable/exchangeable via making a mold of the wrist pin of the right fist, as well as make additional hands (flat palm from long ago [Invisible Woman], trigger finger [Sharon Carter, Maria Hill], and holding fists [Mockingbird], etc).