Hi just wondered if anybody had any advice please?  I'm no engineer so please be kind.  I'm just self taught and use SW for makers for home 3D print projects.  I was trying to make an R2D2 model but modelling the Dome is just such hard work.  I've tried working with solid bodies, surfaces but all my issues are regarding the cut outs never looking correct, tried using Wrap.  I've been using planes around the vertical face at the base of the dome, the planes are tangent to this cylinder at various angles going around the dome.  The issue is that the vertical lines on the rectangular cut-outs are not vertical.  I've tried cuts, extrudes, wraps but always get the same issue.

As I previously said I'm no engineer, I'm sure most would think I'm a total noob, but I've made some pretty cool things, whether the method was correct, I've got there in the end.

Just wondered if anybody had any ideas how to do this please.  The cut-outs look ok at the moment, but the further I try to go around the dome, the more apparent the lines not being vertical on the rectangles becomes apparent.  I also get that there are much easier ways to model this (more so if you really know what you're doing), just thought I'd try it with surfaces.

Thanks for any help