Calling all Pana gurus. I know looks can be decieving. Which hoppers are interchangable? Looking at the 35xx, 45xx, 60xx, and the 80xx series. I have a 6030 in the field that I may need to swap the hopper. I have an 8035, 8045, and a 3530 in the shop. Need some guru knowledge. What do you think?