What strongbutbroken said.
Time to play hardball indeed. If you have documented the fact that he has NOT been spending his 40% with the children as agreed then merrily march yourself right into court or the CS agency and watch as the judge/agency orders his dumbass to pay even more child support to cover the fact that he is not honoring his 40% time commitment.
ETA: check with your lawyer first to make sure you have everything you need.
[This message edited by 7yrsflushed at 7:50 AM, June 21st (Friday)]