Nothing man. It's really an awesome strain as is. Already perfected. Maybe just maybe tho if you're into flavors try a berry flavor cross and try to turn out a warhead like flavor and you'll have a winner in flavor. Dunno what else tho. Grinding up slh is like grinding up hash. It's really dank and a high yielder. Like trich's growing even down the stems dank. It's like looking into another universe when lookin at the trich's scattered all over.