You wanna talk about heavy?!
During my “Jimmie Page” period I scrounged up the coinage ang bought a Carvin Doubleneck (6 & 12). Mine looks like the quilted Maple DT650 pictured on this page: http://www.carvinmuseum.com/playersgallery/dt650.html
I could only play it for about 20 minutes before it would give me neck spasms ;’}. I actually spent more time tuning it than playing it...