The small hole flex disks are not the best choice, they tend to interfere with the couplers....what I mean is the coupler will actually slight protrude into the center hole of the flex disk. I am using two disks at each end on my QL driveshaft installed in my 149. I had one of the NF style FD (149 uses this style) that I used (bought it prior to deciding on the QL upgrade), but I had to use a grinder on the center hole to allow clearance for the coupler.
My advice, get the correct FD to start with, 2 on each end make it much beefier and should last a very very long time.
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Jeff
Brookfield, MO
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IH Red 782 with weights and sleeve hitch!
IH snow blade, Brinly plow, Brinly disk, Brinly harrow, Johnson rear blade, and a #2 IH Cart
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