just my .02..but i say pay back the 200..forget about the ecu..the only thing you can prove that really was his fault..and that he will admit to..is a bad tune..the ecu..no ones takin blame for..sry bout both your luck..i know how this shit happens..(lost 1500 on a motor build and knew for sure..without doubt..what the problem was but cant get in touch with the guy..but i will handle it like a 9th grader if i see him but its also 1500 and for sure proven to be his fault)