Welcome to the snake pit JP and Mrnizzles......great choice!
I've been giving my 811e a beating!
I even broke the rear chassis brace and wing Braces.
I discovered Serpent does make aluminum chassis braces for this car but they
Are only listed on Serpentamerica.com web site. There prices are the lowest I discovered as well but they do charge shipping, unlike Amain.

EDIT: I just spoke with John at http://www.clockworkracingengines.com/ and he is going to start stocking these aluminum chassis braces for this car.

I'm going to tear my car down And change diff fluids.
I'm running a large outdoor fast high bite track.
Should I stick with 5k-5k-3k diff fluid?

I'll post some pics later in the week when I get some new stuff installed.