I saw that bass for sale before you wound up buying it and, being a big fan of Guilds, short-scales and BiSonics, gave it long look.
I tweak the output of my BiSonic-loaded Starfires through an MXR M108S Bass Compressor, a Hartke "Bass Attack-Toneshaper" DI/PreAmp and an MXR M87 10-band graphic equalizer on the pedal board and find that that greatly expands tonal options and enhances articulation, really "waking up" those basses. My suggestion is that you try something similar before tearing into your new acquisition.
Not being personally familiar with G&Ls and their sound, I can't comment on the feasibility of making your SG sound similar. I only know that what I did with my basses loaded with the same pups made me happy.
I tweak the output of my BiSonic-loaded Starfires through an MXR M108S Bass Compressor, a Hartke "Bass Attack-Toneshaper" DI/PreAmp and an MXR M87 10-band graphic equalizer on the pedal board and find that that greatly expands tonal options and enhances articulation, really "waking up" those basses. My suggestion is that you try something similar before tearing into your new acquisition.
Not being personally familiar with G&Ls and their sound, I can't comment on the feasibility of making your SG sound similar. I only know that what I did with my basses loaded with the same pups made me happy.