I have a Massey Ferguson #6 sickle mower I'm pulling behind a farmall m. I finally got it to mow short stuff say 6 inch tall maybe but cannot get it to mow hay or tall fescue that is 12 to 16 inches tall. It wants to pack the grass into the cast end shoe. I noticed a big gap between the bottom of the sections and the guards so I shimmed the back of the hold downs to get it tighter. Helped some but still persists. Help? Not sure what to do with all the adjustments have a significant lead in the bar. Is this grass to tall? Does damp grass cause a people? Far end shoe is set about half way