>> ... I just can't get it right. The line spacing commands seem to throw it off way to much ...
As I mentioned in my response to your first posting, your 'Line Spacing' sequence has an illegal value (7), which means that the printer will ignore it, and revert to the current user environment (power-on) default value (probably 6 lines-per-inch, but could have been set differently).
Your updated PCL snippet contains the same fault:
<Esc>E Printer Reset<Esc>&l0e Top Margin (0 lines)
7d Line Spacing (7 = lines-per-inch unknown/illegal value)
66F Text Length (66 lines)<Esc>&a0L Left Margin (column 0)<Esc>&k8.3H Horizontal Motion Index (8.3/120 inches)<Esc>&k0S Pitch Mode: Pica (10 cpi)<Esc>&l-85U Left (Long-Edge) Offset (-85 decipoints)<Esc>&l+17.8Z Top (Short-Edge) Offset (+17.8 decipoints)
For completeness, here's is an analysis of Jim's suggested 'starting point' snippet:
<Esc>E Printer Reset<Esc>&l2a Page Size: Letter
0o Orientation: Portrait
6d Line Spacing (6 lines-per-inch)
0e Top Margin (0 lines)
0u Left (Long-Edge) Offset (0 decipoints)
0z Top (Short-Edge) Offset (0 decipoints)
66F Text Length (66 lines)