I thought they were not accurate enough for that. I am familiar with the link you posted and as Ducimus says the hash marks are only good for one magnification etc.
I created an .html version of the sliderule omnimeter but Capt Scurvy (IIRC) created an even better beta one although I don't think he's released it as yet as he's doing/done a lot of testing to verify the hash mark accuracy etc.
All that to say that I think the hash marks would be very rough and affect your overall solution. Capt Scurvy's mod may crack this nut.
