The new box’s we got direct from daytona. New style (rectangular). When setting the timing you go to setting “0” on the box. Thats supposed to let you out a light on it without any of the features kicking in and hold your timing to confirm your max timing. Drop the distributor (pro billet) in at say 30 degrees set it. Now we didnt realize there was a problem because we never put a light back on it once we moved it to i believe setting “3” which is our tune. And shame on me for not putting a light back on it. But i highly advise this. Because when we did put it on, it had thrown 7-10 degrees + timing at it. Im confident that that software in the new box had a issue where when on setting “0 “ static timing it had retarded it the 7-10 degrees. So when we put it to setting 3 our tune ,it added the xtra 7-10 without us knowing. Daytona was great to deal with until we had this issue. My original boxes were great no problems at all so this wasnt our first time installing them. But they pretty much said we installed the box wrong and wernt any help. Im still confident that there boxes are the best on the market for carbed motors to run smoother and idle better. But the software in the bew box didnt “add” timing per say. It retarted it when we went to setting “0” for original setup and once switched to the tune was more than we had planned for. Very difficult to explain typing it out. But just sharing my experience so someone else doesnt detonate there motors aswell. Once we figured this out no issues at all.