I believe our Classic kitchen sink is also Corian like the countertop and glued to the underside of the countertop. Thus, one would remove the countertop and flip it over to cut the sink off and install a replacement. Would be a great time to consider other design sinks as well.
Our bathroom sink (same material) has developed a small crack. The counter top is wedged between the two walls. Without removing the refrigerator and the common wall with the bathroom, there is no easy way to remove and replace the counter top.
During the build, I saw the left bath wall and the complete vanity with countertop in place. That was all that was in place at that moment street side. Thus adding the common wall with the refrigerator effectively boxed in the countertop.
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TV - 2012 Dodge 2500 4x4 Cummins HO, automatic, Centramatics, Kelderman level ride airbag suspension, bed shell
2014 31' Classic model 30 twin beds, 50 amp service, 800 watt solar system, Centramatics, Dill TPMS, disc brakes, 16" tires & wheels