It does not seem a bad option, I believe it is one AJB mentioned at the top of this thread. Do I remember rightly that you will be moving the DX to the machine,rather than building the system in? If so I would suggest using 175mm hose to get the best possible airflow, keep it as short as you can (the ribbing on the inside will disrupt airflow) and reduce down to 100mm at the dust making machine (my guess is that like mine your machines will have 100mm ports). If my memory is faulty I would cost out what ducting will cost, the airflow at 100mm quoted seems a bit low but putting 175mm ducting in a workshop won't be cheap - I have just spent nearly £300 on ducting for my DX and that was only 125mm (though about £80 of that was 10m of flexible hose). One other thought, AJB described this unit as having a HEPA filter, it is quoted to retain 80% of 1 - 2 micron particles which is definitely not HEPA but that is still a heck of a lot better that a bag topped machine will give you.
Terry.