Great progress!!
You're going to have to knock out the old studs to reuse the hub on the new rotors. you can have them pressed out somewhere or use a hammer at home. The way I did it was to thread a spare lugnut on backwards to get the nut and stud at the same flat height. Then smack it flatly with a smooth faced hammer/3lb sledge. When its loose then un thread the nut and repeat 9x. The lug nut will be ruined but the thread and stud will be saved. If you need some spare lug nuts let me know I've got some spares you can have. Keep up the good work!