if name not in scalelevels:

                scalelevels[name]=DoubleVar()

            sub.set_slider_var(scalelevels[name])

            scaleopts = {}

            if sub.color:

                scaleopts['troughcolor'] = sub.color

            s = FlyingFader(f, label=str(name), variable=scalelevels[name],

                    showvalue=0, length=300-17,

                    width=20, to=0,res=.001,from_=1,bd=1, font=stdfont,

                    **scaleopts)

            for axis in ('y','x'):

                cvar=IntVar()

                cb=Checkbutton(f,text=axis,variable=cvar,font=stdfont, padx=0, 

                               pady=0, bd=1)

                button = ('Alt','Control')[axis=='y'] # unused?

                # s.bind('<Key-%s>'%axis, lambda ev,cb=cb: cb.invoke)

                cb.pack(side='bottom',fill='both', padx=0, pady=0)

                xfader.registerbutton(name,axis,cvar)

            # effects frame?

            sframe = Frame(f,bd=2,relief='groove')

            sub.draw_tk(sframe)

            sframe.pack(side='left',fill='y')