Shelling help in Solids Modeling Posted January 25, 2004 I am trying to create a space in a 16" high platform in which to sink a 60"x32"tub. The shell thickness of the platform will has to be 14". I am following the same process that I used to make the tub (which has a 2" shell thickness). When I use the shell command, I get my 14" shell thickness, but the platform is only hollowed out 1-1/2" down. I have repeated the process several times, with the same result: an 1-1/2" indentation. What is it that I am missing here?