Well I did it... yikes... we'll see what his reaction is. Because it was more then a 30% increase I had them do an incremental increase. So he pays half the increase now for the first 6 months and then the full support amount by February 2007.
Thank you guys for all your input... I know it's the best thing to do and he'll get over it... plus it all changes again in 2 years when my oldest will be 18, so....