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Ok, I'm here just to share my experience with my jtv 59, I thought it could help the community as it adresses common problems (ping, volume drops in certain strings etc.) I'm not a native speaker, I hope this is understandable to all ;) First of all, by doing this I voided my warranty, think about it before doing anything. I read about this mods on this forum, so the credit isn't mine. I hope this post does not break any forum's rule, in that case let me know and I'll erase/modify it. Volume inconsistency between strings: Probably you already know the cause for this, the negative connection from the piezo is provided by contact on the bridge, but sweat from the hands will form oxide that raise resistance to ground, lowering that saddle volume. The lower E string is more prone to this. Two solutions for this: a. going for a graphtech ghost bridge, but it's not cheap at all, and the variax it's not designed for it, so i went for option b.: give the saddles a proper grounding. I'll explain step by step what I did: 1. disconnected bridge connector https://onedrive.live.com/redir?resid=BBA44F05F3B256B0!390&authkey=!APLs3dI-ytbcNAU&v=3&ithint=photo%2cjpg 2. raised the bridge by using an hex key. As you can see from this pic: https://onedrive.live.com/redir?resid=BBA44F05F3B256B0!391&authkey=!AGV4Ggk2-NnMGhE&v=3&ithint=photo%2cjpg the pcb under the bridge already has soldering pads for each saddle ground, the lr baggs saddle does not provide a second wire for ground, we'll get there. I removed the hot glue globs with an exacto knife, they come off pretty easely, and I desoldered the + wires from their pads. Now the saddles are free, just remove the screws and the pcb will be gone. 3. At this point you'll have something like this: https://onedrive.live.com/redir?resid=BBA44F05F3B256B0!382&authkey=!AMlTDXNemHaZ2-A&v=3&ithint=photo%2cjpg notice the holes for the wires in the bridge, I had to use tiny ones I salvaged from an usb cable. I put some masking tape on the guitar to avoid scratches. 4. https://onedrive.live.com/redir?resid=BBA44F05F3B256B0!384&authkey=!AGviVZ1R68CkB1s&v=3&ithint=photo%2cjpg this is the saddle kept by a needle nose plier, with a rubber band to keep it close, I didn't have a vise at hand :D This provides heat sink, piezos don't like high temperatures, so be quick while soldering. https://onedrive.live.com/redir?resid=BBA44F05F3B256B0!381&authkey=!ANLdF7VbuPA6yQI&v=3&ithint=photo%2cjpg see that pad? the wire goes there. remove enough epoxy to have a clean solder, i used an exacto knife. 5. pre-tin the pad and the wire: https://onedrive.live.com/redir?resid=BBA44F05F3B256B0!392&authkey=!AEP5OkV6mnkZybc&v=3&ithint=photo%2cjpg and solder quick and fearless with a small soldering iron: https://onedrive.live.com/redir?resid=BBA44F05F3B256B0!383&authkey=!AGvyap6hMU05XCk&v=3&ithint=photo%2cjpg 6. After repeating point 5. for six times put the saddle back in place, and solder every wire to each pad on the pcb: https://onedrive.live.com/redir?resid=BBA44F05F3B256B0!389&authkey=!ADJExiPhxu9o7rg&v=3&ithint=photo%2cjpg focus on avoiding solder bridges (as you can see on the D string, I cut that after shooting the photo) and on having shiny solder. Apply some hot glue back to keep the wires in place. 7. remove masking tape, put the bridge in its place and reconnect the wires to the big pcb on the rear. Pinging noise: I found that this noise is in reality the pick scraping on the string, witch is common with piezo bridges, when you palm mute, you're dampening the fundamental, and the noise seems louder. line 6 did a great job in removing this noise in the overall signal, but for unknow reasons sometimes on certain guitars the magic stop working. unfortunately there's nothing you can do about it, so i went to the root of the problem: strings windings I restrung my guitar with D'addario Half Rounds 10-52 that are between full rounds and flatwounds, and reduced pinging noise to a point that i don't care anymore. If you find this too dull sounding for you, mess with volume pot values on workbench to dial back in the lost brightness, I didn't find this necessary anyway. Crosstalk / warbling sound I dampen the strings after the nut and after the saddles on every guitar I own, I hate the ringing sound when playing in staccato. On the jtv this can also improve stability on alternative tunings. pretty easy to do, a piece of heatshrink tubing on the bridge to avoid rattling noise: https://onedrive.live.com/redir?resid=BBA44F05F3B256B0!388&authkey=!AAZJdOig1VBLWj0&v=3&ithint=photo%2cjpg and a piece of foam between the strings and the headstock: https://onedrive.live.com/redir?resid=BBA44F05F3B256B0!387&authkey=!ADWIOE4g37H-xtM&v=3&ithint=photo%2cjpg Peace!