I used the longer MD3616M rod end bearing on the W-716 aileron push tubes. The thread length is a generous 1-1/8″. The shorter M3614M REB’s that come with the kit only have about 3/4″ of thread on them. Even though I made the push tubes exactly per the plans, when the pushrods were test fit in the wing and fuselage with the shorter REB I had exactly the minimum “one-half the threads” engaged. Knowing first hand that these can come loose, ‘minimum’ was close to the edge for me so I ordered the longer REB’s. $14.66 each was worth the peace of mind.
I ordered them from Van’s. They only list them on their parts list, not directly in the web store.
BEARING MD3616M 3/16X3/8M LONG RD END $14.66
Bowen Aero 