Hi Jeremy,
I haven't worked on the front panel display yet (mine is going dim in the centre area), but when I bought it as used with a faulty CD unit, I did dismantle the JB7 and replace the CD drive.
The JB7 is relatively easy to dimantle and reassemble, as always just take time and care. The modules are all interconnected with plug in cables which is very convenient.
Regards,
Peter.