Added Lower Converter and Lower See Thru blocks, I will start work on the vertical tubes soon. I will try to have it in the pack within 1 to 2 weeks.

Updated minor texture issues with the vent covers

Updated internal tube air vents, There was a minor issue with code that made them not pressurize. Also fixed a minor visual issue with the Lower T Junction Converter. Thanks to Jivaii for bringing these to my attention :)

Added another ramp to bridge Jefferies tubes on different floors

Updated mirroring issues for creative use

Public release