Thanks for the input. The specs for the 94_9500 at least in the seperator are the same but differ in the walker area, which is where you say the problem of loss occures. Makes sense. The cost of operation is an issue that can add up over time. What would you say the differece in costs_unit are between a 9400 and 9500IJ And what do you think the difference in capacity is between these machines (9500=100%). TIA.