Procabin 6x7 projector

Question

Stupid question:Can the ProCabin be used to view ordinary (non-glass mounted) 6x7 slides?Below is a description of its capabilities. It appears that one is supposed to put the ordinary 6x7 slides into a manual push-pull carrier.Description - 85x85mm glass mounted 6x7, 6x6 and 6x4.5cm transparencies in its standard drop-in slide gate. Manual push-pull carriers for 6x7, 6x6 and 6x4.5 as well as standard 35mm attach easily. A glass filmstrip carrier for unmounted 120 or 35mm film is also available.