[darkwave]

I don't know for certain if you can leave it connected, but I know that I didn't. I understand your comment about it seeming tedious, but my approach was to audition in batches. I have 6 guitars I wanted to use the Spectrum DI with, so I would just load up the 16 user slots with all images that met reasonable criteria for one of the guitars, then I would audition them in detail with headphones (trying to block out the acoustic sound). In the end I had a single preferred image for each guitar loaded in the user bank.

I limited myself to one for each so I wouldn't go nuts futzing with things after that initial investment of time. Close enough for rock-n-roll. I know there are some that say auditioning MANY images, including those that don't match your guitar type, results in the best match, but I opted to narrow the hunt for practical reasons.