I have the 401, and it is one fine machine. And yes, it is a work horse. You can download the 401 manual online, but of course it is nice to have the manual if you can get it. You can sometimes find the manual on E-bay, but a decent one runs $25.00 and up.
Here is one for $29.00:
http://www.ebay.com:80/itm/ws/eBayISAPI.dll?ViewItem&item=150675862827&ssPageName=ADME:B:WNARL:US:1123