Does anyone know of any SS carto/pro type tanks that have flat tops as opposed to the tapered top look of the protank (that was a mouthful)? I use the x6 & x8, and know about the AGR (but don't own one). Are there any other's you may know about? I love the sleek lines and look of several of the rba/rdas but I'm not at the level of rebuild skill yet.