Help with GuiObjectView

I'm using a GuiObjectView to revamp the player selection gui for a game I'm working on, but when I mount accessories and decals to the player, they don't appear in the correct place on the model even though they do in game. frequently the appear at odd rotations, or at a strange offset away from the body. Has anybody else dealt with this before? and how did you solve it? I think the problem may be related to the fact that some of the accessories use the same mountnode, and different slots, but GuiObjectView doesn't seem to have any way to specify the slot to mount to. I'm guessing there's some internal node name I need to know instead of "mount0," etc, but, I don't know how to figure this out. (I did find a bunch of what seem to be node-names by opening the .dts in a hex editor)

last question, are the nodenames for GuiObjectView case-sensitive?