This page documents how the database is built and how a verdict is produced. Every specification is read from a manufacturer document: an operator manual, brochure, or published spec sheet. Aggregator sites and retail listings are used to corroborate a figure, never to establish one, and a retail listing is never cited as the source for a product it sells. Each record stores the source URL and the date a human confirmed that the document describes that exact model and variant. The compatibility engine then applies five checks to rear three-point implements and three additional checks to front-mount attachments, returning full match, compatible with notes, or incompatible, with each note naming the specification and margin behind it. Where a figure cannot be confirmed, it is left empty. Corrections are published, not silently applied.