Believe it or not, I've tried that b/f posting this.  My additional form is setup to print 55 details line, so I set the check spec to print 50.  Wellll, that merely added additional blank pages. 
Thinking that I needed to remove the advice section, I setup the "Spec Option" with a layout = "None", "Check", None.  That didn't work, as it just caused the check details to advance up on the page.  I tried 500 details and locked up the system.  
OK.  Just tried 99.  I've gotten 27 pages of the check header, and the check details d/not print.  Interesting.
Question:  Is this perhaps b/c we are working with a 'custom' sized check??
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Ishana Alexander
Grant Thornton