I hope your transplant works out well. I remember you had a few problems with the 69 as an "early adopter". Are you not satisfied with the actual guitar, or is the PRS just more comfortable. I have a deposit on a black 69 with single coils and Maple Fretboard, and keep getting delay notices on delivery.
I know each new run seems to get better and better. Are they on 2nd or 3rd trem revision?
In my opinion the JTV-69 is a pure result of flawed CNC Neck profile design for my needs on a very basic level. You must play 5 JTV-69's to find one that is playable.
Sorry for the rant - but the whole affair of the JTV-69 Neck width at the Nut is reminiscent of the bread in this famous sandwich https://www.youtube.com/watch?v=ypcSHTLlK8E
Remember I base all this opinion as a long term Les Paul Player.
I cover some of the specifics in this thread http://www.vguitarforums.com/smf/index.php?topic=8612.msg61784#msg61784In my opinion the JTV-69 has really odd geometry. With the wide E-E spacing of 2.1055 inch at the bridge, this leaves only 0.116 inch between the string and the edge of the fretboard at the 12th fret.
When playing, the JTV-69 has a tendency to have the E strings fall right off the edge of the fretboard, making basic hammer on riffs nearly impossible because the string to string spacing at the Bridge is too wide, for the Neck IMHO.
Compare the dimensions to the Jay Turser Strat - which is actually a great playing guitar with ideal geometry with more available fret under the string - .15875 inch between the string and the edge of the fretboard at the 12th fret, compared with only 0.116 inch on the JTV-69.
Another issue is muscle memory - if you are like me and grew up playing fast cross picking riffs on a stock Les Paul / SG, - then a guitar with a wider E-E spaced bridge that is up to 0.1 inch wider than the Gibson can impact your technique and leave you a few missed notes at the gig if you don't adapt your playing style to the wider bridge.
So here is a list of the problems on the JTV-69.
* JTV-69 Tremolo Piezo bridge has a very wide "Strat Vintage" E-E spacing of 2.1055 inch at the bridge.
* JTV-69 Neck above the 5th fret meets my preference for a "Fat" Neck at .92" inch thick, but below the 5th fret the JTV-69 tapers down to a kiddie guitar dimensions being only 1.1612 inch wide at the Nut - I find the JTV-69 neck is just "too narrow" at the Nut for an average adult to play a clean 1st position A7 chord and maintain an open G string. Its rather like they dialed in the CNC machine with the goal of recreating the Neck profile of a '62 Strat - but failed miserably with a very narrow width at the Nut.
* Then to add insult to injury the stock JTV69 Nut has the string spacing cut just a bit too wide for the neck, the net impact of all the above dimension of the JTV-69 deliver an unplayable guitar, with both E strings having a tendency to fall right off the edge of the fretboard.
* The JTV-69 Floating Bridge never returns to center, due to the various methods Line6 informs World Music in Korea to route the bulky hex cable harness https://www.youtube.com/watch?feature=player_embedded&v=4AqSfrahEZg
I go into all more details of The JTV-69 Tremolo issues here - which I'm proud it became a sticky on the official Line 6 Tyler Variax Support Forum http://line6.com/support/thread/73637
By Contrast the JTV-59 is a totally different experience, it feels very much like a PRS McCarty or old Les Paul Neck Profile, and I feel right at home.