Saw a great tip on FB today to prevent the pins from popping out of the rear arms using Losi 22 SCT pins:
https://www.facebook.com/photo.php?f...&theater&ifg=1
I plan to make this upgrade after seeing a local racer pop the pin over this past weekend.... he didn't break any parts, but I guess those arms will flex just enough to make me nervous, and this fix seems simple enough to me.