If you really want it, this is the list of changes for 243. Nobody's saying you have to make them, but they exist. It's maybe a bigger conversion than you thought.
TURRET
The turret bin is a completely different one. It's wider, it has parallel sides, and it has a gap between itself and the turret. Also, the crews in the 2nd company were fond of attaching wooden ammunition boxes to it.
There are two pistol ports, instead of that big hatch on the side.
The mantlet is flat. After all your work on your own mantlet, you might prefer Tiger 223, the only one in the battalion with a "thick" mantlet.
(You can see an ammunition box attached to the turret bin, in that photo.)
HULL ROOF
The little pairs of strip mounts for the S-mine system are not on these Tunisian tanks.
The long rectangular thing behind the driver's hatch is not there.
The tow cable is slightly different; the outer end is not positioned behind the inner end, it's forward instead, because of not having the strips there. There is less cable on the engine deck as a result, and the clips there are moved forward a little.
The cable holders (on either side of the turret) are different. The wooden rod is broken into 5 rather than 6 pieces, so the left ones are shorter. They are also farther apart.
The antenna tube at rear right corner is the other way around (wide end at the back) and the wide part of it actually hangs out over the edge of the hull.
NOSE
The front mudguards are completely different; narrow, no folding portion, and with a diamond pattern surface and different hinges.
Two open holes are located above the driver's visor.
Spare tracks are stored in brackets on the front upper wall, including some track from a Pz.3.
The front edges of the hull sides are shorter, Kslanting forward, and the tow shackles in them are higher up.
SIDES
The side mudguards are very different. The front ones are shorter than the rear ones, they are attached in a bent line rather than an exact straight line, and they have no end panels.
BACK
The rear mudguards are very different. Narrow, with no folding portion. Three ribs with built-in handles.
The toolbox is not sitting in a special shaped tray, it's just resting on 3 metal bars with a single strap.
The exhaust shields are a different shape and have ventilation slots cut in them.
The exhaust pipes don't have that cover standing over the top valve.
The adaptor plate between the exhausts is attached at an angle, not vertical.
The Feifels have two cylinders on top, not a single compartment. The rear cap is in a different place.
There is no tool stored at the bottom right of the hull wall.
That's all!
David