I have been thinking about purchasing the Microtek Artixscan 1800. It would be used to scan 4x5 positives. I was reading your forum and Mr Dolde seems to be using a Leaf45 with great success. I would be most appreciative if the forum elaborates in both directions. The pros and cons and any other suggestions the you may have. Maybe this two scanners can not even be compared to each other. I am new to 4x5 and I am experiencing a steep learning curve. I am running a dual processor Power Mac 10.3.9 which is quite new but I am afraid may not support the Leaf45. Thank you.