Tried makerware but soooo many settings in there that I don't yet understand, lowered bed temp to 105 and that helped marginally.

Start of prints looks like a bowl so like you suggested, think heat is an issue, the FFCP has a cooling fan but didn't thinkit was a good idea to activate when using ABS ? nor do I know how yet either. So doing bulk of experiments on the old FFCX and final working prints on FFCP. Will try duplicating prints and see how that goes.

Thanks for your help and taking the time out to reply, shall post results tomorrow.

Cheers