I recently purchased a pair of used Vaqueros (original model) and they have the Bullseye rods installed.
Both revolvers were used in competition, lots of use with cowboy loads. I noticed an issue that will present itself with long term usage. With the OEM base pin and ejector rod, when the cylinder is removed, the front of the base pin rests squarely against the ejector rod tab. The bullseye ejector tab is concave on both sides, and the base pin rests against that concave surface, and the tab puts a side force on the ejector pin. Eventually the opening of the hole will wear oblong.
I trimmed a bit off my base pin, so it drops out just as in a Colt SAA, to prevent any more side wear.
If you install a bullseye ejector, trim the base pin or install a Colt style one.