You're talking about your 501x presumably Col.
I would just run a solid arm...I don't have any problems with this setup. I mean, how are you gonna wreck your gears? It'll be a hard knock that does it, not steering, and how often do you crash and burn so severely that it will wreck your gears or transmit the damage elsewhere.
Sure you may break a servo mount under severe conditions, but they're meant to break rather than something else - they're made out of softer plastic for that reason aren't they?
In fact I think I've been far to kind to my servo's in general, and especially when setting full lock...let them gurgle and churn is my new attitude to this.
Give it some stick!
