Well, I finally broke something on my F201 this past weekend. The new uprights are great and the reinforced lower arms are a must. What I broke was the pick-up point for the rear track rod on the gearcase side. My first thought was well I must have popped the track rod from the ball connector, but nope, and then I thought well it's about time that one of those new upright broke. Nope, got to say it was a rough tumble, but the new improved uprights held. And I've been running them since August.
BTW, these uprights are Tamiya spares with the same part number, just got to look carefully to see if you got an improved upright.