If you need that tool for drilling into foam there is little hope of you building a plane. LMAO Squares and levels pus a incidence meter is a must for scratch building. I had 5 degrees pos on my wing and -1 for the motors and my elev was 0 , I would have been running strings and levels all over the place to figure it out without my incidence meter. You first have to have a level workbench or you will be off to a bad start from the begining. joe