I did mine for about 2 week around one of the jap shows for a fast run in my old V All interior removed inc carpets/doorcards/rooflining Dash otu and just cabletie clocks to column Theres a massive strengthening bracket dealies in between front and rear in the V that were a good 4kg alone. Took passanger seat out too but put it in for drive to show as i took a mate up. Allready had keepfit windows etc Foglights out, number plates off ..... Think that was it in all honesty, but just keep removing stuff, was awesome as a daily. Got pulled and copper just looked inside and said "Im not sure how legal or illigal that is so im going to ignore it" Then gave me a £30 fine for running a mini bike plate instead of full sized one and said im not allowed to cable it to rearview using the excuse "Cable ties are lighter then bolts and safer then sticky pads"