@ akgwhiz
The Pro-Ject RS2T CD Box transport, with its top lid fully opened to its upright position, where it will stay open whilst you load/unload a CD, the upper edge of the opened top lid measures 9 3/8" (nine and three-eighths inches) above the top of the surface the transport is placed upon - so if the underside of a shelf above your transport is 9 1/2" or more above the top of the shelf below it, your transport’s top lid will comfortably clear the underside of the shelf above it. (I very carefully measured my own RS2 T, using a quality Stanley carpenter’s tape measure.)