I've been looking into replacing the 27 year old mast on my E23. It has seen alot of wear and tear and may be weakened where there was alot of corrosion underneath the winch mounts. Anyway, every where I look the sections are so small and light compared to the old one, I am unsure. Did they overbuild the old one or is the Aluminum stronger or something? I'm talking alot of difference. I don't have the exact cross section, but the new ones are around 4.88 X 3.00 inches. My old one is at least 7.0 X 4.0 and maybe bigger. I'll measure tonight and post tomorrow. Thanks for any info. M.Gann