Yes Fredricks. They are the only ones selling reconditioned Yanmars that are up to the quality level that God and Yanmar intended.

There's a little history there. Fredricks negotiated with Yanmar and got exclusive rights to use the Yanmar logo on their rebuilts (rebuilt in USA) based on agreeing to a high level of quality.
The recent thread here about a splined coupler that connects the shaft from the clutch, into the Powershift pump, and had chewed up the PS input spline, as well as being welded (!) to the clutch shaft, is an example of suspected mismatched parts on a likely 'rebuilt'. These instances are more rare now, but in that instance real expensive to get right. In another recent instance I encountered, a seller of 'YNM' VN rebuilts advertises a little backhoe as 'digs 6 ft' while another dealer has the manufacturer brochure online showing 4.5 ft. Who do you believe, the manufacturer's brochure or the YNM importer's representation?