Question. I remember seeing a service bulletin on the MS290 and 310's back in the day about replacing the duck bill or rather a missing duck bill with a grub screw. Is the same true on the 025 saws. If so, what size of grub screw works as it seems like the hole is larger than that of the MS290's. If I am off track here, what is the remedy? Thanks in advance of any and all replies.