I can imagine that the Oneida Dust Deputy for Fesstool vac's high selling price must accommodate a hefty tooling cost (assuming it's not roto molded) and the expected sales volume (low) which consequently is reflected in the selling cost. A part from the expense I hate to loose the Systainer top surface to accommodate other containers. My thought is to place Dust Deputy in a SYS 5 container and have it set on top of a SYS 4 or another SYS 5. I might start out with just a SYS 5 and a cyclone to see how it works. I can imagine that the walls may need a little reinforcing from the stress of the vacuum. Realistically Festool ought to make something similar and offer it as an option. If it works as well as the video does it would be a no brainer. To integrate it into the vac wouldn't take that much room with clever design. Perhaps 3" added to the hose housing would give enough room as I'm sure they could steal some room from the vac housing. I'm sure the folks in the marketing / finance departments would hate the loss of the recurring revenue.
Lastly, has anyone found a cheaper source for the permanent vacuum bags? There are other sources in Europe but not in the US. It looks like I could take a 5 micron bag made for another vac but similar in diameter and length and take it to a shoe repair place (they have sewing machines that can easily sew the bag to the plastic flange). There I would have them use the flange I salvaged from a paper bag and attach it and then sew the top of the bag shut. As it is it comes with a flanged bottom and clip like other vacs use. To empty you just slide the clip which leaves the whole bottom open. I expect the HEPA filters (for those that have them) will get dirty quicker but they are easy to clean.
Lastly, has anyone found a cheaper source for the permanent vacuum bags? There are other sources in Europe but not in the US. It looks like I could take a 5 micron bag made for another vac but similar in diameter and length and take it to a shoe repair place (they have sewing machines that can easily sew the bag to the plastic flange). There I would have them use the flange I salvaged from a paper bag and attach it and then sew the top of the bag shut. As it is it comes with a flanged bottom and clip like other vacs use. To empty you just slide the clip which leaves the whole bottom open. I expect the HEPA filters (for those that have them) will get dirty quicker but they are easy to clean.