That works for me Sportpilot

In the past and STILL never maiden ed is the 1971 Top Flite stand off scale 'Red box Edition, Mustang which I did considerable (build ups of material,) as opposed to adding a balsa filler block,which is difficult at best to "laminate" to the existing balsa So I mixed and mixed name brand Carpenters wood working glue with Brown Micro ballons It had properties similar to bondo howeer-was thicker in consistancy It fully cured in 24 or less hours and sanded and THUS blended nicely with the surrounding balsa structure. and it was lighter than polyester Automotive filler too I thinkk..