zebreck

I've found that MechJeb is completely unreliable for calculating the Dv or TWR of reactor/thermal nozzle based designs. It will tell me things like my TWR is 0 while i'm accelerating into orbit or that my total Dv is 167 and increasing while I burn to the Mun. Is there some modification I could make or a different mod to use to get accurate TWR and Dv numbers on reactor/thermal nozzle designs?