@WBLskier, as far as I know, the only difference between running SG with a smart timer/magnets vs mapping the course is how the timer is triggered - if you map a course and run with a smart timer, it starts timing/propagates a GPS course based on the first thing it passes (mapped GPS coord or magnet). The guys at Perfect Pass advise not to map if you are going to use a smart timer, either map/no smart timer or smart timer/no mapping. As @BCM mentions, the mapped GPS position of the gates vs where they actually are can drift - very simple to fix by re-mapping, but if your course has magnets, a smart timer eliminates the "drift"
@WaterSkier12 - SG/ZBox works great for us ('98SN/ACME422). We split our time between a couple of SN200s and the '98, SG/ZBox isn't ZO, but n our case, the '98 pull feels much closer to ZO with ZBox than running SG without it