It seems strange that this much trailer only increased the front height from 37 to 37.5". Normally, getting to within 1/4" is close enough. But since you only moved it 1/2", you could say you only returned half of the lost weight to the front. You need more weight transfer, to get it back to 37.0".
I'm not overly familiar with the E2. That much trailer would be much better served by the 4pt Equalizer. But assuming they work the same, you should be adding washer(s) to change the angle of the head, to transfer more weight. You should only touch the L-brackets if you have good weight transfer, but the trailer isn't level.
thebrakeman ('70), DW ('71), DD ('99), DD ('01), DD ('05)
2004 Surveyor SV261T (UltraLite Bunkhouse Hybrid)
2006 Mercury Mountaineer V8 AWD Premier
Equal-i-zer WDH (10k), Prodigy Brake Controller