A few months ago I remember looking at a spreader that was a rotary spreader but had the ability to convert to a drop spreader to you can get closer to flower beds and such. I would like to look into purchasing one like that but don't remember what company makes it or how much it costs? Any thoughts? Also some granular fertilzers don't have settings for certain spreaders on the bags. So how would I determine what rate to set a spreader at if the bag does not tell me???