[EricH]

[npoe]part of me is screaming to do something with the Underground Railroad... but I can't.[/npoe]

This practice facility didn't work out because of which of the following:
a) unpowered practice robots for balancing
b) carpeted ramp (everyone knows it's a polycarb cover over HDPE)
c) too many visitors wanting to get up close and personal with the robots without PPE
d) all of the above