I just came across the blog and wanted to provide some additional insight. I know that Rev-A-Shelf's customer satisfaction is a priority and that they have been sending out the "New" 448TP Wood Pantries and slides since last month. In short, it might be an issue with whom you are purchasing them from...I would contact Rev-A-Shelf directly for help finding a supplier that has them in stock. As the "NEW" Design it now features their new adjustable rub bushings that provide for more stability and limited side-to-side movement of the product in the cabinet and on the slide. Finally, the image of the Hafele unit is NOT solid wood and if comparing to the 448TP originally discussed you are not comparing Apples to Apples.

List for Magic Corner 2 mechanism is 1530 to 1530, stores 1080 sq ins- don't put a drawer above it, not the best thing for feild install. A better choice is the Hafele Lemans units- list $870- stores either 884" or 1057 (the one that takes the same wall space as the MC 2- do NOT get the smallest one unless you have no choice) Easier to use with aging back, more flexible storage, can still have a drawer, can be feild installed easily. You have to watch the direction that they swing out if near a range. There is a limiter that can keep it from hitting a range if it must be placed there. An alternative are the Rev-A-Shelf half moon pullouts- Plastic ones list at $272, Wood 441. Again don't get the smallest, storage is less than Lemans but they pull out in a different direction. Lemans is my first choice for blinds BUT final determination is made based on door opening and direction of swing/clearanc, and storage requirements. I disagree that a super susan is the most efficient- depends on the layout. When doing a susan, if I'm doing either frameless or inset I always use a Suzi Q- which has a slightly higher sq in than typical pie cut super susan but is easier to use.(Suzi Q is NOT field install ever)

Richelieuhardware.com It's out of Canada, but ship worldwide. Prices are pretty good.

By way of update to this thread, I attempted to design a LeMans II 60, the largest size made, into my kitchen and realized only in the final stages of cabinetry finalization that the door required for this size of LeMans was so large that it was a warp risk for a 5-piece wood door and would put excessive weight on the door hinges. As mentioned in a previous comment, the largest LeMans II 60 offers more of a semi-circular shape without the peanut indention and thus provides the maximum storage area. However, I would not recommend using it unless you have a configuration with a pull-out drawer on top of the LeMans area simply to shorten the dimensions of the door required for the LeMans. I had originally planned to order two sets of LeMans trays and make the entire cabinet a 4-tray-pull-out LeMans which you can do in the same style of their high pantry option, attaching more trays to a single pole set. However, in the end I changed this cabinet design to close off the blind corner and use a drawer stack leading up to the corner instead due to logistics concerning the oversized door that would have been required. Some cabinetry doors are more prone to warping than others. A solid wood slab would have the greatest risk, then a 5-piece wood door. An MDF door would have the least risk of warping in a large size but might also present some concerns about holding solid to hinges with that weight and screws fitted into the MDF panel.