Well just to illustrate what I'm going on about below is a rough timeline of what's happened so far.
Send impressions to CE.
Get 'phones back, right one doesn't fit despite being made as deep as possible as requested.
Phones back to CE with instructions to adjust as they would any other as the theory it wouldn't fit unless deep fit didn't work out.
Phones arrive back. More comfortable but not sealing properly. Back to CE.
Phil decides to send me a new set of redone phones (this is where having the initial scans stored on computer come in handy, worth a £10 if you fancy some more down the road!)without being adjusted at all so we can pinpoint the issues.
Get phones back, as before the length of the right is too deep for comfort as it hit's up against the bone of the inner ear. However this time it is sealing nicely. So it's just a case of adjusting the length of the canal so it doesn't hit up against bone and we should *fingers crossed* be done.
Why it's been necessary to go through all that lord only knows but that's where we are and why I keep praising Phil and CE's customer service.