I've found my G5420T TVJ really well tempered at gigs. We're a reasonably loud band and ok I only tend to use pedals for soloing but feedback hasn't been a big problem. Maybe it's down to the pedals used, for instance I have no problems with my Boss OD3 but run into issues when using the Electro Harmonix Little Big Muff. Finding a 'safe' position in relation to your amp is also a factor. Importantly, when I do want to induce feedback I've found it quite usable and controllable, unlike my Epi IBJL Casino which screams at you the slightest opportunity but that really is a hollow body. I've noticed inside the G5420 there is a strip of wood that runs underneath the pickups from front to back, with a single support post underneath the bridge. Maybe this is what's helping.