I hear a lot about JHP but who are they ?  And where can you buy them ?  £30 seems a lot cheaper than £125 for a FIM chip from Sigma !
 As regards the CO trim,  I had been experincing slight "missing" around 3000 rpm, the trim pot was found just lean of centre so I set it to the mid point today and found the missing almost gone. Perhaps a slight richening may completly rmove it,  I,ll try next week .  I dont have a CO meter at the moment so am not sure the percentage. I am lead to believe the trim pot will have an effect across the rev range, but less so at the highter rpm ?
 Allways glad for technical advice,  cheers.