1. u obviously pushed the tuner 2 tune it because u took it bak a second time with the same symptoms as b4, even with the squirters etc replaced. u knew there was something majorly wrong, and should have been asking 4 rebuild NOT a tune. that does not fix a broken eng. sounds like you wanted it 2 blow up on the dyno so u could get a free eng .....
2. the tuner did not blow it up, u did. u drove it home didn't u ? the prob was the same as BEFORE u went there, but got worse the more u drove it. just like what would have happened if you never went to this workshop anyway.
the same (b4 and after tuner) components will need 2 be replaced anway. once again good luck with the new engine.