My preference is for bent pipes (any degree) and most of the pipe racks that I have do not accommodate these pipes. Usually I cannot get the stem into the hole without the bowl getting stuck. The only one that I have that works has grooves for the stem and not holes. But the pipes tend to fall out; a 3 row pipe rack of this sort usually provides a landslide of pipes if one on the top row falls out. Any suggestions about racks that might work better for bent pipes? Not that I don't like the pipes just lying on my desk for me to gaze lovingly at; it all about economy of space.