Great work getting in to the full body mate, it has completely rejuvenated mylifting tbh. Just make sure that you done rush in to adding too much weight too soon. This of the week as the complete session which you want to finish, and not the usual just get through each day mentality which is imbred in the split idea.
Take it steady, work with lower weights than you would normally (about 50% is a good place to start) and build up very slowly. Like BtB said just one rep per week is over 50 reps exra a year and if you can increase 1lb per week weight your squat, rows, presses and bench will have gone up a staggering amount in the same year