Originally Posted by Masami Halsey

This is why it's so hard to modify and adapt parts! I have no clue. 74mm length, and a reference to 3.5mm inner pins were the only references I was able to find on the web. If You're a Yokomo fanatic (I was during the SE/Dogfighter 1 days... sold a NOS kit a few years back), it's easy to keep track of, I imagine.

The hub carriers that I ordered definitely had inserts set up for 2.5mm. That's why I was excited to learn that the RC10 inserts fit so well (after cutting to length). If there are 3mm-pin yoke inserts available, I'm all ears.

Thank you for measuring your arms!
Do you happen to know the part numbers for each?