Thanks for everyone's input. I have great respect for the tuner and my engine builder, I know things can be overlooked but I feel this is something I have not done properly or missed, or a poor ancillary part I've used. The engine does run warmer it used to sit halfway between 1/4 and 1/2 mark and now it sits a couple needle thicknesses below the 1/2 mark at cruise. I put it down to being a new engine but have a decent gauge on the way to monitor actual temp of coolant. Oil temps I'm not sure, I might try to get an OBD reader to check. I removed the I/c inlet pipe and used a bore scope to visually check for any possible blockage - all good. I can't really check my muffler without cutting it off to see if it's collapsed so I think I will buy a new one and have it installed. One thing I noticed was the PCM was too hot to hold your hand on when I got home after a long drive - temp gun said 70deg. The Plazmaman piping (which runs right by) was quite hot too, I think it's from the the thermo fans blowing straight onto it, not sure if this is normal? Aaron @JETURBO have you had a chance to look at the mods list? Thoughts?
Edit: convertor is stock stall speed but a stronger built unit, not much more info on that unfortunately.