Awesome! The body/head on the Krote is a little tricky, but it otherwise builds up awesome. It's also easy to rig for lighting, if you want to go that route.
I order lots of model detail stuff from HLJ. On their Sci-Fi page, go to the left side, and click on the Item Type box, and scroll down to Option Kits - they have a TON of stuff in there.
I'm not a fan of Snake Chain, it looks too much like a woman's necklace to me. I use Kotobukia's Spring Units - the 1mm for arm mounted power cables, and the 3mm for the leg cables. They're cheap, so you can get a bunch of different sizes and then decide what you'd like best.
http://www.hlj.com/product/KBYMS02
http://www.hlj.com/product/KBYMS06
The white metal hands are long out of production, but these are an inexpensive option:
http://www.hlj.com/product/KBYMB-27
http://www.hlj.com/product/KBYMB-32
I've used them, and they look just as good. With the Ma.Ks you bought, the hands in the kit are good enough that they shouldn't need replacing (the Fliege and the Kauz have terrible hands in the kit). If you decide to change them, 1/144 scale manipulators are sized about right. The 1/100s might look too big.
If you want to get really fancy, you can cut the individual fingers apart at the joints, drill holes through them lengthwise, run some wire or brass rod through them and position the hand any way you want.