Quote Originally Posted by Daniel Unkefer View Post
Well, Drat. Both of my Combitube units have curved sides, on both sides, so there it is. Perhaps the one coming my way will be more like the ones you folks are describing.

My plans for Combiplan Dev Tanks 3 by Nokton48, on Flickr

Here's the box for what's coming to me next. It says it develops plates, so we will see.
No, one side is curved it’s other side is straight. And, when you assemble the rack do it so the lock rings are on opposite sides, that will make the rack stronger and, if there are any blue washers, throw them away, they haven’t been needed for over 30 years.