After getting modification to my 8070 with PF parts, I felt so excited. However, I found out another problem with my PF RC when I tried to control new 8070, I got confused. I couldn't remember Up is Right and Down is Left or in opposite. I spent time to look around on Bricksheft, Google, etc. But I couldn't find a best solution for myself. I saw a lot of AFOLs use the Steering wheel, but for me it's just to hard to hold the PF RC in hand and then control both Driving & Steering functions at the same time. Therefore, I decided to create ones for myself, so I bring some photos of that Steering Function Module here. It's easy to detach from PF RC, so you can attach it with many others.
Brickshelft link: http://www.brickshelf.com/cgi-bin/gallery.cgi?f=476185
Here we go: