[argyllcms] use entire sheet for print targets

Hi all,
I'm playing around with argyll to create a profile for a Canon Selphy currently - a 4x6" photo printer. This thing can make borderless prints so I wanted to fully use the (quite expensive!) paper - which shouldn't be problem with the i1 (that doesn't really need extra margins). 

What I do is
#printtarg -v -ii1 -p 100x148 -m 0 canon_selphy_blabla
The "-m 0" reduces the unnecessary borders at least on the right side visibly - but there's still only a few rows and columns on the paper - mostly because there's so much white around the patches - especially on the left. Can one reduce this to - let's say "zero"?
In the same way I could live without the information printed on the right and smaller column identifiers. Is there any way to disable this as well? 

Thanks
- Stefan

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