just do it i maidened my trainer without any instructor i taught myself and i did ok trimming it too,just get it up high before you trim it!!.just make sure shes balanced right before you take her up and you,ll be fine!!.i flew mine a dozen times without an instructor before i crashed []but the crash was my fault not because she wasnt trimmed!!.my advice is just do it if you can fly you,ll have no probs as long as the planes balanced!!,remember to check the latteral balance too!!.