I did a bit of work on the Jagdpanther on the weekend. I'm finding it fun, challenging, and satisfying, actually. I've compared photos of the interior of the Jagdpanther in the IWM with photos of the Verlinden set, and an elevation scale drawing of the interior through the centreline, and I'd have to say that while the Verlinden set looks good, it's not exactly on the money, at least not for the IWM machine.
I've come to the conclusion that the rear hatch of the Jagdpanther was similar to that of the King Tiger - possibly for standardisation. I might be wrong, but it's a fair assumption, I think.
When I started on the lock & breech of the 88, I made a resin copy of Dragon's Nashorn breech (from their first Nashorn issue - which has been since re-tooled once or twice. This breech differs from the Jagdpanther breech in a number of areas, which I've corrected as far as my limited abilities permit, by slicing, filing, filling etc. Even if I'd copied Dragon's King Tiger breech, it wouldn't be the same as the breech of the machine in the IWM. The breech is probably the most significant interior detail, by the way, in terms of visibility.
I made a recoil guard out of 0.020" card, using the Dragon King Tiger guard as a template, and gave it a flange of 0.010x0.040 strip. This has been superglued to the left-hand-side of the breech. The details on the right-hand-side of the Dragon King Tiger guard seem to be slightly inaccurate, so I'll make new ones.
The most difficult part (or group of parts) to make will be the gun mounting, I think. I have a good feel for this in two dimensions, and a reasonable feel for it in 3 dimensions, but I think that it will need to be constructed / fabricated with a lot of care. I might do it using a sprue "skeleton" and attach plastic card to the skeleton. The sight (which has a periscope that moves in an arc on the superstructure roof) is attached directly to the gun mounting. It is a massive piece to make, and fiddly because the gun is attached to the superstructure, as will the mounting be, but the mounting also rests on a track which is attached to the hull floor plates!