The DIY lighterweight muffler is not taking the desired shape just yet and of significantly lighter wheels I am only dreaming too so time to value the little things:
Scored more than a kilo by changing the EVAP and tank breather/charcoal canister. Lines and canister out, one way vacuum valve in.
Scored just under another one by replacing the ashtray/lighter combo with a voltmeter and usb port.
Right, I value those two marginal gains so? Bring on the big ones!!