Dual trip meters

(I may have asked this before) On the home screen, below the speed indication there can be two other displays. What could be useful here is to have two tripmeters, (ie trip A, trip B) with each one being able to be individually selected and reset. Taking that idea a step further, being able to set either trip A or trip B forward or backward by 1/10s with plus / minus soft buttons or the tablet volume up / down hard keys. Feasible?