Oversize AN175-20A bolt solution worked for me
My RV-9A has 800 hours now, and made some noise from the front gear when using the toe bar. I found I could rock it back and forth very slightly with the weight off of it. I purchased the oversize bolt and metal lock nut, and it went back in snugly, having to turn an old nut on the bolt to seat it. After final torque with the new nut, I have no more play in the gear.
This is obviously a huge relief and thank you for the creater of this thread. It proved to be valuable information for this non builder.