I have exactly the same problem and have tried everything. It works in most cases but especially under bad weather condition reverse trust and autobreake fail. Plbne continue with 150+kts. One example is Tokyo, RJAA 081405Z, were I fail several times, but under good weather conditions reverse trust and auto breake work well. I was suspecting this to be the rod cause. But I think we have to wait for the sp1 to get this fixed.
Anyway: T7 is a great plane to fly.
Jan