We had mediation which finished just before the summer (though we are supposed to have the final appointment), but he has complained he didn't get the paperwork sent to him and is always claiming not to remember what was agreed.
His financial situation s pretty dire and he recently suggested getting back together, I think to save his financial skin. I made it clear that wasn't going to happen and afaik he received the divorce papers last week.
Yesterday he emailed to say he had 'acceded to everything in mediation' (he didn't) but wasn't going to be 'trampled on' anymore 
. He had agreed to apporx £14k now, which is as much as I can raise against the house minus 50% marital debt which was actually all his fault and 50% of the divorce costs (if we were to sell he would risk ending up with less) . He is now saying he wants me to sell when the dc leave home (about 12-15 years) and give him a further 15K then. Now I think it likely I would be able to raise that amount at that time without having to sell, so should I agree to that now? I have no savings but a reasonable income. I worry all the time about dc's university costs and had been vaguely thinking that maybe I could downsize when the time comes or use equity - I don't want waster of an ex taking that opportunity from the boys. I can see myself at 50 + having to start a mortgage again, the boys not being able to go to uni and ex getting a great big pay out on top of the inheritance he has always described as his pension, which he expects from his dm.
He also says he is not happy with the access he has. I think it's about 60% in my favour but he quite often reduces it here and there - odd nights he can't do, dropping them back a couple of hours early etc. I can't say he's unreliable, but while he claims to want 50/50 his actions quite often contradict this. I wonder if it's even worth contesting it though. My understanding is that 50/50 is considered ideal these days and he was sahd before leaving 2.5 years ago... If I just nod and smile, I'll probably end up with pretty much what I've got now in any case as in reality he doesn't always prioritise the dc. Or is that a stupid idea? As a teacher, I want to be able to make the most of the school holidays and have 65% of them, but would a judge ever agree, despite the fact I am so busy in term time and ex isn't? I guess not, so there's no point in me fighting that 
. He ended up only having them for 25% of the summer hols anyway, but unexpectedly insisted on exactly 50% of October half term at the last minute.
I don't want to pay for another round of mediation when he is likely to go back on it all again and solicitors will be expensive and I'm likely to lose out, so should I just agree to him?
Sorry it's long and waffly. Off work with a poorly child and my solicitor hasn't returned my call and I can't stop it all churning round in my head...