dont think its been remapped,i havnt driven it since i fitted the gauge,just reved it to about 6500 and it went up to 5,fed the pipe through the bonnet release cable grommet in the end as i didnt have enough pipe to go the way you suggested Rhys
ran it across bulkhead near diverter and upto the FPR,think it saved about 3-4 inches and gave me just enough to do it.
just been up the ringroad,and you were bang on Rhys 8-9psi under load,alls good for now