small clone clone, hiss and mn3007 question

[gaffled]

Hey guys I built a small clone and everything is working great, except the hiss in the background kind of bugs me.  I was wondering if some mn3007 are noisier than others.  I don't have any extras lying around or I would try a different one.  Also does anyone here have any mods to lower the noise floor of this pedal.  One thing I did notice if I turn my amp down (which is fairly quiet noise wise) and dime my guitar volume the hiss from the pedal goes down considerably.  If I have to I'll use it like this because this chorus is the one for me, but I would rather not have to.  Thanks for any help, Mike.