I've broken off my right hand elevator a total of 3 times now. Once was caused by hangar rash that I didn't notice, the other two times were when it caught on snow. (One takeoff, one landing) It was never a big deal to remove some covering, and simply CA it back together, and re-apply some covering. Without drastically changing the design of the elevators, (removing the balance section) you are going to be prone to them catching if you are taking off or landing in deep stuff with a lot of elevator deflection. Building them much stronger will only cause something else to break. The way they break now, they're easily repaired. Sheet them and you'll probably break either the stab or the whole tail off, and that won't be nearly as easy to fix. Think of it as a safety valve. Yes, you break the elevator, but it's an easy fix, and nothing else gets broken. It will fly fine with one side broken off, in fact, it's almost like there's no difference in most cases.
I used the stock mount on the stock firewall with no modifications. I did use 30 minute epoxy to glue it up, since that will soak into the wood better than 5 minute, but with well over 400 flights, it's just fine. I started with an OS 46FX, but on hot days it was tough to hover, so I went to a 50SX. On cold days, it hovers at about 1/3rd throttle, and on really hot days, it's about 5/8ths. The only change I made in mine was to join the elevator, and use one servo for it. Obviously, it's a more powerful servo. Next time I'll use 2 elevator servos, so I can use the features on my radio to use the elevators as ailevators. This will give more control in a hover, but isn't really necessary.