Remove Taper from object Somehow in my adventures of creating this thread, I tapered the whole object. Is there a way to straighten it out again? I can't find any solutions to this issue. 

I am sure re-designing it would be faster, but I want to learn.
Here's my approach showing how you can achieve it using the Cast Modifier (Cylinder) and shrink/flatten tool. 


Add the Cast Modifier and set its mode to Cylinder. Set Factor and Radius values to 1.000. Apply modifier. Next enter the Edit Mode, select all the inner faces with Alt+RMB, then press Alt+S to scale them down. Finally in Object Mode press S,Shift+Z to scale the whole object fitting the original mesh's parameters.