Dale, palm sanders do work well for most dry wall tasks, in fact I usually use a 5" random orbit DeWalt sander on normal sheet rock joints. But this time, due to some remodeling along with the repairs, I have some 6" wide patches to sand level. With the 10" sander (buffer) I did MUCH better at making those really flat. With four times the 5 incher's surface area, I found it does really well on normal joints also.