I am with CC on this . I have tried different mods from named brand to home built ones and imo HW mod is one of the best if not the best
We all hear different any how and it depends when testing mods which way the wind is blowing .
My mate wanted to try a different mod on his r10 ,i stood to the left of him with the wind coming from the left and the standard bsa mod seem really quiet , then stood to the right of him and it sounded a lot louder ,so beware of this when testing