If you do decide to stack your units

Unibind machines are some of the best
thermal binding devices you can use. If you have one of these products,
whether it's the small XU138 or the XU638 which has an astounding six
heaters, chances are you're looking for space in which to store both
your supplies and your machine. Something that can help you solve both
those problems is the Unibind X-Tower, a modular product that can serve
as a storage cabinet for your Unibind supplies and provide you with a
work surface if you place several of these items together. Here are the
strengths and weaknesses of this product.

Strengths:

• The X-Tower is a storage
  cabinet that stands about 17 inches tall. This makes it small enough to
  be placed on a flat surface such as a countertop. You could even store
  it under a desk.
• Each unit has enough storage space for 4 to
  8 boxes of covers and/or spines, depending on the size of the box. This
  will keep your supplies handy and organized.
• Due to the
  X-Tower's reasonably small size, you can stack one on top of the other
  to create a larger storage cabinet or to give yourself a work surface
  on which you can place your Unibind machine. The surface of a single
  unit is large enough to accommodate the XU138. If you place several
  towers together, you'll have a big enough space for the larger Unibind
  devices. You can even tack on another cabinet to give yourself some
  space in which to assemble your books before binding them.
• If you do decide to stack your units, lifting them will be easy since one only weighs about 13 pounds.
• This
  product is shipped flat to help you save money on postage. This method
  of shipping also helps the cabinet to arrive at your office without any
  damage. However, the utilization of this type of shipping means that
  you will need to put the tower together yourself. (More on that in a
  moment.)
• This product is gray and black so it will be an unobtrusive addition to any office.

Weaknesses:

• Since the X-Tower is shipped
  flat, it needs to be assembled with an Allen wrench before you can use
  it. Assembling the item isn't too difficult, but it is a bit annoying
  to have to put the product together.
• While a single tower is
  pretty affordable, buying multiple ones will definitely put a dent in
  your budget. Also, all of the the supplies are sold separately.
• Some
  of the X-Tower's parts are made out of plastic, including the rails
  that support the boxes of supplies. This product isn't really designed
  to support heavy items, such as fax machines or printers.

Overall, the X-Tower really works best when you combine several units
to make a complete surface/storage area. This product offers a
fantastic way of storing your covers and spines, and it's great that a
single tower can support the Unibind XU138. Therefore, if you're the
proud owner of a Unibind binding machine, the X-Tower is definitely
something you'll want to get for your office.