Other than strings, no. I like the feel of, [u]its acoustic tone with[/u], and how it plays with D'Addario EJ16 12-53s.

Been playing mine for two years. Doesn't need any mods IMO, unless you wanted to fit a scratchplate? I didn't. It's a small enough area soundboard as it is.

Ordinarily I'd swap strap buttons out for Schaller locking, but because the instrument socket is integral to the body button, in the the individual case of the APX600 I use flexible silicon grommets instead. Tuners hold tune, nut is fine, string anchors do their job, so nothing to mod really