You describe them as small and large but don't say which picture goes whit the model options offered. Very confusing. Clean up the description and I match with picture so there is no confusion and get back to me. Then I'll decide.
Maybe I can help:
Long model with 7 in-line slots: S323
Long model with 7 alternate facing slots: S360
Short model with 3 slots, hole at one end: S311M
Short model with 3 slots, holes at both ends: S311T