I think most questions have already been addressed, what everyone should be looking at now, is this;
1) The re-tune gained HP and torque with the E370.
2) The same tune on the previous tuners dyno, showed the same (new) power both with the new tune and the old tune.
I still argue (until someone proves otherwise) that the old tune doesn't contain the spark advance data change (because it wasn't part of the tune) and therefore, when adding the old tune back on, it wouldn't "remove" or set the spark advance back to the previous value, when applied.
If not that, or another reason, what's being said, is that one of the tuners is fixing numbers, which is ludicrous in my opinion.
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