My lower arm modification seems to be working great. I went to Walter D. Faith Memorial Field today, and it did fine on all the rocky gravel and anything else I threw at it. I even got stuck in some grass in a deep puddle, and nothing popped apart when I had grass torqued around the axles. I'm very happy with my Trailrunner right now.
I also saw a Nissan Skyline R32 on my way to the place. Nice!
And here's a video:
Enduro Trailrunner - 9/12/21 - PFC Walter D. Faith Memoria… | Flickr