PC on Oldschool q8 Hornbow

I have had an oldschool Gold req8 Hornbow for awhile now

15-28 Damage
Lightning Bow String (I found out I can mod the bow string, I can put a 20/20 or fire BS on)
+14% Damage While Enchanted
+19% Enchantments

It's not maxed mods or it'd be worth a lot. I recently made a R/D that I use this on, would be good for a R/E too I think, but I was wondering what it's actually worth.

I believe I can mod the grip as well? So the only thing I cannot change is the +14% while enchanted so you think that is what makes it not worthful?

I honestly don't think it's worth anything, even as requirement 8, it has a very lackluster damage mod.