I read through this thread again, and didn’t see if it was mentioned as to whether or not part of the pathetic 60’ times were the result of tire spin.
If it’s not really spinning the tires....... after looking at the overall combo...... I don’t know how you could possibly end up with 60’ times that bad, out or that pile of parts.
On paper, the combo looks sound.
Since the OP has gotten the skipping to stop, yet the 60’ times are still terrible..... the two things don’t appear to be related.
So...... the question for me is......spinning off the line?
Or not?