John_J, Lateral stability is accounted for in the software for sideshifting AND rotating attachments and is reflected in the "min/max offset" columns on the summary results page. Mast tilt limitations are also considered and displayed. Fork capacities at extended load centers are also accounted for in the software and reflected in the capacity rating results, as well as the effect of load center on all attachments mounted to the forklift. The software also displays whether the attachments or forks are limiting the forklift capacity or the attachment and/or forks have excess capacity and quantifies this amount so the attachment or forks may be optimized for the chosen configuration. Only certain forklift models are currently listed in the database. The software utilizes only published manufacturer's test data and therefore accounts for all the physical and structural limitations of the forklift (mast, tires, cylinders, hydraulics, etc.) The software is revolutionary and is designed to consolidate massive amounts of information in one convenient location, perform complex calculations instantly, and provides information that was previously unavailable. Professional Forklift Engineering Services is a licensed engineering firm in the USA, experienced in the field of forklift capacity ratings and as such, is allowed by OSHA to provide forklift capacity rating plates. Thanks for trying it out. It is presently free for your use, and through its use you will become more familiar with the powerful features it offers. You can also email us on the website if you have specific questions. Thanks again John.