Fingers crossed you can sort this out, do you know a subaru specialist around you?
perhaps its time to get them to investigate, piece of mind fella

 

There is a Subaru garage near'ish me, but wont use them for cost reasons. And the mobile mechanic that you will hear a lot of his name on here, Tim Farmer. I have spoken to him on several occasions and he too is unsure as to what it could be

 

after repairing all those cracks and splits etc would it be worth resetting the ecu , just a thought .

i feel your frustration dude

 

Is that by disconnecting the battery for a while? Is so, done that a couple of times now