Be aware that whatever reads the dsdt.aml file, it is case sensitive. In an Insanely Mac forum, it was mentioned that the file should be named DSDT.aml. Changing the name solved my stuttering sound and sleep problems (you still have to turn off legacy USB support).
Note the install instructions do state to format the internal drive as HFS+, but no mention is made of any difficulties concerning case sensitivity. It does make one wonder if there are other issues when running HFS+ in case sensistive mode.
Mini 9 with 2GB RAM, 64GB RunCore SSD
, BlueTooth, 1.3Mpixel camera, HFS+ journaled case sensitive.