Three questions please no arguments, leave them on the to solder or not to solder thread (thought a virtual fist fight was going to break out fence1). First is it too late to add jumper wires on my layout. the track is laid and parts are ballasted. At least I know some of the worst spots I still can, not ballasted. Second is it too late to solder the joints. Third how do I solder. I have searched but not found anything because of the enourmous amount of threads with solder in them. I have a soldering iron lead and rosin core solder. I am out of flux if I even need it.