"He said he would if I wanted, but he then talked me into writing to ex to invite him for a miam. It will go in my favour."
That's good, I think at least attempting (or rather being seen to have attempted) mediation is the best course of action here.
"He said that 50:50 is absolutely not the aim. I don't know where I got that notion from, did a sol tell me, did he brainwash me, it is me still trying not to rile him and be fair? I don't know anymore."
I'm surprised the mediator didn't elaborate on this a bit more. When I went to court there's a quick mediation session to see if an agreement can be thrashed out before it goes before the judge, and after my ex caved in and agreed to everything the CAFCASS guy said that 50/50 is becoming a lot more common... Perhaps where your mediator days it's not the starting point, he means it's not a given. Don't forget, contact isn't about what is good for you, or for the ex, but rather about what is good for the child. You don't have to go for 50/50 if you don't want to, but if your ex was reasonable I'd say he has a strong case for it if he got his shit together. It would certainly make you look good if you offered 50/50 (albeit in a form you know he is unwilling to accept!)
"We talked about joint or shuttle mediation. Joint would be hideous but preferable and the mediator would put a stop to any sort of abuse. Shuttle would mean I woudn't know what he was saying. That would be worse I think. I don't think it will come to that. I doubt he will go to a miam. He said that if it sounded like he was just hoop jumping rather than showing any willingness to engage with the process he would sign the form."
I think biting the bullet and going for the joint mediation is the best course of action, otherwise it will drag on for ages. With a bit of luck the mediator being there will force him to act reasonably and you might get somewhere.
"Meanwhile I emailed ex about the rota from after 1/2 term (31st Oct), saying that we should start the one we agreed upon ages ago. Nope. He's come back with something else, which I suppose fits in with his work.
It's 50:50 but lots of here, there, here, there."
If you feel brave enough, offer him a reasonable schedule with a similar amount of contact but with less to and fro. If he disagrees, say tough... Will take a lot of balls but if you can't say it over email then the mediation won't go well. The time to find some strength in this respect is fast approaching I feel.
Got to dash for breakfast, will add some more musings later :D