In a message dated 7/22/2004 1:50:58 PM Pacific Daylight Time, k7acz at cox.net writes: A 5' X 5' X 8' base sounds kinda small for a 72 ft tower My Tri-Ex 72 footer uses 4-1/2 x 4-1/2 x 7-1/2 foot base. It's on the drawing.