Scotts Pro Edgeguard Spreader

I purchased this unit hoping it would be better than the one I already have, which is also a Scotts spreader. While spreading this morning the 'feed door' would not shut when I released the feed lever when I reached the end of a run. It did this at least ten times. I do like the feature of shutting down the right side for trimming and when working properly it was a great unit. The problem of the feed not shutting off in the past, and I assume I will see the same problem now, is that it kills the grass when you get so much fertilizer in one spot.

Calibration is way way off. It dispenses way too much fertilizer. Spreader setting on the Turf Builder bag was 3.5. I went through about 1/3 of a bag on about 1,000 sq. ft. of lawn. I finally had it turned down to less than 2 in order to complete the remaining 4,000 sq. ft. of lawn with the rest of the bag (12,000 sq. ft. bag from Costco). There should have been a calibration tool included with the spreader like there was on my 20 year old Scotts drop spreader. So far nothing has broken or fallen off but it's only less than a year old, time will tell. I do like the wide swath that it dispenses and the edge guard. Now that I've got the setting dialed in I guess I'll keep using it but it still "aint right".