First off, Inf, your mine cart booster is bad effing ass. I didn't take a look at the loop you had until night before last, friggin awesome.
Pra3 and I finished off the north end of the tunnel from HTP Base down to a spot near spawn that DE helped me finish.
Overall it is ~6km in length.
We railed ~2.5km last night. 3.5km to go. One stack of iron block is 576 ingots, 6 per rail unit of 16 rails, 1536 rails per stack of iron (and a few sticks).
Pra3 used all the iron I had at HTP Base, which was like 1.5 block stacks, and I have just over 1 block stack on me, so tonight I think we'll have the line to spawn at least.
I've got shit tons of various materials in chests scattered over like 100,000 square km, but I lost my waypoints in the update, so most are probably time capsules now.
Prata (instead of Data hahahahaha SEE WHAT I DID THERE) is working out track switching, boosters, etc. It will be some time before we can lay a second track, so we are attempting to allow bi-directional boosting on a single line.
SO... might be done this weekend, both sides.