I use the stock U brace so I can't say what that mod will do.

I just changed over to the B44 plastic hubs (#9730) and saw a big change in how my car handled in and out of the corners. I run at a track similar to the one you described in your other post. I also run a 17.5 with Barcodes.

My buggy was pretty hooked up the other day after making that change. I plan on swapping to 30 degree caster blocks next to see how that changes the steering.

I use the Brent Thielke Club Racing Indoor Clay set-up sheet with very few changes.