I magnetized my hull to allow me to swap out the upper hull parts to make the 251/1 or the 251/22... I can also make several other versions of the 251 as well.
I glued the gun mount to the upper hull and made the troops seats removable in this 251 model to allow room for the 7.5cm PaK 40 L/46 mount that hangs down from the upper hull when its in place. Here is the final result... crew and stuff can be placed in the back.