As promise, here are some photos of my new TM M4 S-System with the full stock modification. As Vondnick said it was realy easy to do. The stock fit's like a glove. The only "tuff" part is to re-route the wires to the back. Of course, by doing this you have to open the gearbox. I used an SR-16 stock with all the wires and fuse attachement. Ho and don't forget the "stock spacer". You have to cut it down a little before the wires can get through.
So enjoy...
Click here for pictures