Casting Completely newbish resin casting question

Ok, I did some searches for this, and didn't come upon the answer, but I apologize if this has been asked and answered in the past.

I read through Don's wonderful tutorial about casting hollow pieces with the 3-piece molds. I understand how that technique is used for hollow, 2 piece torsos. I've also read the great tutorial on head casting. What I am wondering about, are the string channels on arms and legs. Do most of you slush, or rotationally cast, for these pieces, or do you cast the pieces solid, then simply drill out the string channels? I'm still in the theoretical stages of this myself. I'm working on a tiny, and I am about 3/4 through the sculpting. I hope to begin making molds next month. She is a rather "tiny" tiny, just slightly larger than a naripon, so I'm wondering if casting her limbs solid, then using the dremel to make string channels afterwards, might be my easiest bet. What do you guys think?