I believe we are talking about the same type of unit: The "Double Stack" - "Double Fork" units allows driver to use the same lift truck to handle either single or double pallet loads. Spreading the four forks allows handling of two pallets side by side. When brought together, the four forks convert to two forks ready for single pallet handling. As I said I am sure that they have thier benefits but here are a couple of my concerns with these units / attachmetns: 1. When forklifts are used in areas also used for pedestrians (other workers) such as in a production facility, you need to ensure proper aisle share space. Therefore if you are going to use or move loades twice as wide as a single, that space must increase. Often there is no more space to add. Therefore these units must then only be used in "designated areas", e.g. loading, warehousing. So, if I can use a "single load" unit throughout the facility why would I want to introduce a unit which can only be used in a specific area. The switching on and off would be a time concern. Again, I am talking specifics here. Our drivers load, unload and service produciton lines (with forklifts). 2. The stability (as I watched loads being placed, removed) is somewhat of a concern. Our product is light and a "soft touch" when handling is needed. This isn't a big problem, but when "double pallet" handling the load simply doesn't appear that stable. 3. I mentioned this before, but when removing a double pallet, often it simply is two wide to remove from older, aging, trucks. The loads often get stuck or hit (damage) the dock side seal rubber units. The operator needs to drop the load and remove them one at a time, again, making the double pallet unit back to a single pallset unit. I guess to sumarize it I am not seeing a gain, at least in this specific situation. Appreciate the input and would entertain others. Thanks.