I think the idea is to end up with the best solution for a given site taking into consideration safety, level of use, and morphology of the cave. Peacock is not some little spring off in the middle if the woods that gets maybe one or two trips a year. You don't make the same traffic and signaling considerations for a driveway connecting to a rural road as you do for the entrance to a mall.
One size does not necessarily fit all.
It seems first you should consider what you are ultimately trying to accomplish, then how best to reach that goal. Is flexibility not important?
And just for argument's sake, there is plenty of room in the entrance room at Peacock to run a line away from the main line if you just wanted to practice.


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