Good Afternoon, Cinderic,
The common 8 x 10 drums originally meant for processing color prints typically have some kind of arrangement which allows 4 x 5 prints to be fitted without coming loose. The same feature allows 4 x 5 negatives to be processed in a virtually foolproof manner. On the Chromega, which I use, this is accomplished with three plastic removeable dividers which run lengthwise in grooves molded into the interior wall; a simple sliding spacer on one divider completes the arrangement. Other tubes on the market, such as BTZS, are sized to hold just one sheet of film.
Konical