Wait a second. That post did not mention a larger beer line but a longer beer line. Readjust your thermostat to acquire 38 F beer temp. If you reside at sea level, set pressure at 14 PSIG and install five feet of 3/16" Inside Diameter (ID) tubing.
As to the tower, try to use a fan to force air up the tower but install so that the air can return back into the box.
Scott Zuhse, Instructor
Micro Matic Dispense Institute