Rclement...

Yes, that's exactly what I use. I measure and mark with painter's tape a spot between 5 and 6 inches. Then I mark that tape in 1/4" increments. I use the CG machine and set it right in the middle and then balance from there. I then use the probs on the CG machine to double check myself. It really works good for me. I've used my machine a hundred times. I try to check every plane several times, even after initial flights.

Thanks
Barry