Drum shuffle?

[Roberto Leibman]

I have the following piece in 12/8:

hh8 r8 hh8  hh8 r8 hh8  hh8 r8 hh8  hh8 r8 hh8

In drum notation this is traditionally grouped with bars as this:

 _______   _______   _______   _______ 
 |          |  |          |  |          |  |          | 
x    r    x  x    r   x  x    r   x  x    r   x

That is to say, groups of three, with an 8th rest in the middle.

I can't seem to get the beams to look like this. I tried the following 
settings:

%%% revert default values in scm/auto-beam.scm regarding 12/8 time
#(revert-auto-beam-setting '(end * * 12 8) 3 8)
#(revert-auto-beam-setting '(end * * 12 8) 3 4)
#(revert-auto-beam-setting '(end * * 12 8) 9 8)
#(revert-auto-beam-setting '(end * * 12 8) 2 1)
#(revert-auto-beam-setting '(end * * 12 8) 1 8)

%%% your new values
#(override-auto-beam-setting '(end * * 12 8) 3 8)
#(override-auto-beam-setting '(end * * 12 8) 6 8)
#(override-auto-beam-setting '(end * * 12 8) 9 8)
#(override-auto-beam-setting '(end * * 12 8) 12 8)

This works if I have three consecutive 8th notes, but not if I have the 
rest in the middle.

How do I notate this?

Thanks,

Roberto