Yes, a number 7 blade probably would've been better than using a guard, especially for a nice short cut. Sometimes you can get better results with a guard by doing the clip going against the lay of the hair instead of with it, but you have to use a longer guard for this, so you could try that too. I stay away from comb cuts as much as possible because you have to make sure there are no matts for the guard to get stuck in, and then constantly re-fluff the hair for an even cut. Also, the number 7 is notorious for catching skin rolls in the flanks and neck, so another trick I learned is to use a number 5 going against the lay of the hair. It leaves the hair the same length as a number 7 and looks great. This is a good trick to use if your 7's are leaving lines in short-coated dogs like a lab shavedown. Hope this helps!