Okay this one has me stumped and now I'm curious to know the answer too.
I.A.N.A.A. (I Am Not An Accountant). However, I think that there are some other downsides to turning business spending into unreimbursed business expenses:
You can only deduct unreimbursed expenses to the extent that they exceed 2% of your AGI. Based on your other thread about profit sharing you could have an AGI of around $150k this year, which would mean if you go the non-reimbursable business expense route, you'd end up with an additional $20,000 of business income on paper but only a $17,000 deduction to balance it out. Assuming you're in the 28% tax bracket, that would add $840 to the tax bill. In addition, while the deduction would reduce your income tax liability but it wouldn't reduce your payroll tax liability. You're making enough not to worry about social security, but medicare self-employment taxes would still increase by $580 (20,000*2.9%).
So getting that extra $4,000 dollars of tax deferred space might require paying an extra $1,420 in taxes.