I am doing free balancing of props for fellow RV owners at KRNM. Ramona, CA. Last one was typical, .31 ips initial to .04 in three runs. I even provide free AN hardware for the weights. Can't beat that deal. Nice to make friends on the forum. Owner removes cowl and takes readings. I set up sensors and tell you where the weights go. In the process, you learn exactly how to best use the dynavibe and learn how I do split weight calculations. Jim