We might not need that as a prerequisite after all... Seeing what I can do, I'll keep you posted. Obviously with Christmas things'll be a little crazy for a bit, but I'm going to see if I can't figure this out on my own... If I do, I'll make a new thread.
Update: So apparently the touchscreen drivers for our tablet have a userspace element that interacts with the kernel, rather than having the touchscreen drivers wholly in the kernel... The problem with that is twofold: these are precompiled files we're dealing with, and the dependent files we would need to include total 1.7 MB, but the TWRP source before integrating these files is 7.5 MB. So it is like berndblb said, our recovery is too small to include the files we would need to include. If it weren't for the additional files, it would work fine... Wondering if maybe there is a device similar to ours that has the touchscreen drivers as part of the kernel...? Maybe we can snag them and use them for our tablet, if only for the recovery mode.
Update 2: Built it, but no touch input. Mouse works fine, but only while docked to the keyboard (and a mouse dongle plugged into the dock). This issue is well beyond me, but there are some very skilled people working on the Nvidia Shield (which has the same touchscreen as we do) here: http://forum.xda-developers.com/shie...2#post57969432