Great writeup, and you have some great cars my man.
For the traction control, it is pretty easy to disable the whole thing. Put it into Sport +, hold down the DSC button for a few seconds, and you will see the following confirmation messages.
Current - 2015 981 Cayman S
Past rides: 2014 F22 M235 - MT, CWP / 2011 E82 135 - LBM, N55, DCT / 2008 E82 135 - AW, N54, MT
2007 E92 328 - JB, N52, MT, ZSP (traded in for 135)
2007 E92 328 - JB, N52, MT (retired by a drunk driver)