Finally got my ST to be re-mapped for the arrow cans I fitted. I took it to SWM Triumph in Moutain Ash, South Wales. Top guys and all sorted for £30. They're a mine of info and the bike is much sharper and running smooth as. I have no connection or relationship with these guys just thought they did a good job for not a lot of money so well worth a call if you are in the area- 01443 740916
For £30 I expect it was an upload of the correct map for the Arrows I first thought that was bloody cheap for a dyno run and custom map Glad it is running smoother for you.
No dyno work done just the upload, easy money for them I guess but the result was well worth it and I imagine if they packaged it all up in a load of retail therapy bull they could easily charge a whole lot more to non engineers like me! Thanks for the reply, I'm learning loads on here!!