Gibson Ripper E String Sustain

[lavmonga]

Hey everyone, I've got an old gibson ripper that I just can't get any sustain out of on the E string when I drop it down to a D tuning. The note is loud and clear but then immediately trails off. Every other string sounds fine, I made some truss adjustments and the neck is straight, any thoughts?

[fenderhutz]

Thicker strings.

[xlows]

+1

[lavmonga]

I'm already playing 105's, what's the next logical step, 110's?

[fenderhutz]

After that would be a preamp.