hi eric. based on online info, the monthly duty cycle of the first three models is 100k which i think can handle a 30k monthly volume but these are, as stated by mikadonovan, TONER BLOWERS. the monthly duty cycle of mp7500 is 300k and i agree that with proper maintenance this can very well handle the 30k volume with no problems. though based on my experience with high speed ricoh's, i encountered developer dropping at the feed assembly which caused problems.
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