I'm not dealing with any tuning issues, other than one loose feeling tuner that Fender/Gretsch is replacing. And I'm not a big vibrato user. But, I know from experience that a decent vibrato needs a roller bridge to insure return to pitch and overall smooth operation. So my wanting to add the roller is just for future consideration. Thanks for the other specs that I need to be aware of.The specs you need to match are the post spacing, radius, and string spacing.
The post spacing on nearly all imported guitars will be 74mm centre-to-centre. Double-check yours with a ruler or calipers before you order, but that's probably the right number. If so, just make sure the bridge has 74mm post spacing.
I believe the fretboard radius on the 5230T is 12", so you should look for a 12" radius bridge. If you can't find one, a mismatched radius won't be the end of the world, but matching the radius would be ideal.
I'm not sure about string spacing on your guitar, but you can measure the spacing between your strings and compare the specs on any bridge you're thinking of buying.
One thing to consider: if you're looking for a roller bridge because you're having tuning problems, a roller bridge is probably not the solution. Most tuning problems are caused by a poorly slotted nut or by the tension roller on the Bigsby. The Bigsby tension roller creates a steep string break angle which often puts too much downward pressure at the bridge and too much upward pressure under the roller. All that friction keeps the strings from returning to pitch properly.
Before you order a new bridge, try restringing your guitar with the strings overtop of the tension roller. If your tuning problems disappear, then the Bigsby is the issue. The solution would be to buy a Brick's BiggsFix. It's a replacement tension roller that runs more smoothly and gives a shallower break angle. He offers free shipping to forum members.
I'm really hoping to find a unit pre-drilled to the 1/4" posts. I don't really feel comfortable drilling it myself.This roller bridge is very good and very affordable : Göldo HW05C
I use it on two of my guitars :
G5220TLH - with redrilled holes to fit the 1/4" posts :
And there's also the ABM2400C, excellent but costy device :
I'm not dealing with any tuning issues, other than one loose feeling tuner that Fender/Gretsch is replacing. And I'm not a big vibrato user. But, I know from experience that a decent vibrato needs a roller bridge to insure return to pitch and overall smooth operation. So my wanting to add the roller is just for future consideration. Thanks for the other specs that I need to be aware of.
It's been a while since I had a Bigsby, so when I put fresh stings on my new Jet, I forgot to run the first of the new strings under the roller bar. When I discovered what I had done, I re-installed those strings "correctly".
Now that I've heard your solution, the next set I put on will go over the bar, intensionally this time. And I'll keep the stock bridge in place to see how that goes.
Thanks for the heads up.