So, I've created a tunnel bore, following this, albeit much bigger (mines 115 blocks at a time). However, I can't seem to find any feasible form of teleportation in tekkit. there is no thaumcraft that the author used to automate the mystcraft books, and it seems that using dimensional doors actually results in a dupe bug (seems that if you try to move a dim door with MFFS power manipulators, the original dim door doesn't move, and instead a vanilla iron door is spawned and moved instead). While I haven't tried mystcraft portals, presumably, they don't work either. Wondering if there is anything else I can try?