Well, a string change later, including upping the gauge to 45, 65. 85. 105 together with a once over including intonation and string height seemed to have sorted most of this out. I was most worried about the low G on the E string but that seems ok now.
I played my first gig with the Stingray, or Irwin as my mates have nicknamed it, along with the AI focus and Bullfrog 210 I bought from eubasix. Man what a sound. Why didn't I but a 'Ray years ago?
Cheers,