I am finishing up my '2017 build and I am running into problems with the steering setup.
1.) The Steering link is hitting the topdeck. As stated in the manual I shimmed it 5mm.
2.) This is my main issue right now, I cannot get an equal throw left and right. With 100% steering I always end up with the endpoints at 85L and 95R. If I increase the throw to the left the shims hit the steering rack. Since the steering is symmetric there shouldn't be that much of a difference with the EPAs in my opinion.
1- Hey, look, someone else who realized that this steering link which cannot hit the topdeck still hits it

I had the same issue ... solution is twofold : either a TM/Serpent "bended" ballcup, or a slightly shorter servo arm (or one of the "inner" holes in the servo saver if you use it)
2- Check that your servo "neutral" is dead-vertical, that all links are 100.0% symmetric, etc... Still towards the end of the servo rotation, due to the geometrics of it all, 1% extra EPA really isn't much extra throw at the wheel, hence it doesn't take much asymetry in the links to be slightly different L/R. As long as all your linkages are ok and you're ok with the handling, I wouldn't worry about it too much