Tommin has already built one and he has done fantastic on it ..... You can email me on www.m41a.com. He is good at working those kits ,he could tell you anything about it......
If you look on his website ,at the top by his picture ,you will see where it says tommins studio 2004 ,click on that and then terminator arm and you will see the steps Tom takes to building one and its step by step pretty much , he is good ....
I saw his tutorial and i'll take a look. I think i'm getting too many projects going at once lol. Seems to be normal for me no matter what i'm working on.
The only resin kits available of the endoarm are all recasts. The only resin kit that's not a recast is the one made by Shawn Morgan over ten years ago...so that one is hard to find.