I've had my R320 for 3 or 4 years and have always left it on. I've never noticed any abnormal drop in cart levels. I used some head cleaning solvent a month ago or so and cleaned all around the carriage, inside bottom, and where the carriage parks and ya there was some ink but not to the point to where it got saturated from leaking ink carts.
Alan i've had a RX680 sitting here since Thanksgiving and haven't install it yet cause i unclogged the prints heads on my R320 lol Let me know how you like the RX680 when you have yours up and running.
The duplex mode seems like it would be really handy. I'm thinking about a CIS when i finally install it. I disc printer is a must for me and the RX680 looks full featured. (even in the box :bigsmile: :doh:)
I still have 6 sets of carts left for my R320.