I am currently training with a power tap pro and racing with a power tap sl and have had great performance from both. I am thininking of purchasing an ergomo system for my TT bike because I can't use a disc with the power tap and because I need a backlight as most of my mid week training is in the early morning hours. I have some concerns over the accuracy of the ergomo based on what I have read. If I cross check the erogomo with the power tap, assuming the ergomo is off, can I dial it in to match the power tap? If so how and how complex would the procedure be?