Holy Cow! For a beginner, you really like jumping in the deep end, don't you? Pun intended. Asymmetric deformation and a skewed base. Okay, what you need to do, if you haven't got them already is to install The two plugins Sketchy FFD (Freeform Deformation) and Joint Push/Pull. Until you've done that you won't even be able to see parts of the skp below (like the control points of FFD) After you've done that, open the file below and click through the scenes tabs at the top. They will baby walk you through the entire process. Until you've learnt a little about those two plugins, some of the instructions will still be gibberish. FFD is accessed via a right-click context menu on the selected Group. JPP has its own tool-bar. I hope this helps. Bathtub Construction.skp