Thank you for all the feedback! I just didn't know what to expect since I was getting this conflicting information. I have to admit that my gut is that I will get a better end product if there are no countertops in place when the templating is done, and that is how fabricator number two (my preferred one)operates. Good suggestions on asking why it takes so long after the templating is done to get the counters installed, especially since the material is right here in town already, and the fabricator only needs to go over to the yard to pick it up. I can more easily see living for three weeks without countertops than the sink (and as my husband said, if there is no sink there is also no dishwasher!). Since we plan to reuse our sink, I think I am going to talk to them about the possiblity of leaving the sink in as someone else here did. I appreciate the personal stories and the advice.

have finished the 4th remodel (wow 2 yrs since earlier post on this thread!). Used all white (no patterns speckles or veining) in MasterBath, Butlers Pantry Wet Bar, and as BACKSPLASH in Kitchen whose counters are Stainless Steel. (the rest of kitchen is all white cabinetry with brushed metal pulls). No qu that the white is stunning, crisp, pleasant. MasterBath is fine. Butlers Pantry: the white counter is unforgiving and shows everything. So on a second bathroom we chose white with a little gray veining and that has been excellent / easier. Kitchen all white backsplash with white cabs above below has been great and VERY easy clean (we cook a lot and use spices that stain too). But the all white in kitchen would have been intolerable as a counter for us. Stainless steel is not for everyone but 3 kitchen renos later, (2 remain actively in use) we love its cleanliness and the patina and very, very low maintenance. It looks surprisingly good with Cesarstone / Quartzite type stone products

We have had almost the exact same issue with our corian. The builder wouldn't even come to check it only went by the pictures we sent. Then blamed it all on something "very hot" had to do that! I can tell you now, it did not. There is also a large dip or warp over the dishwasher. When we pulled it out there is absolutely no heat barrier or insulation to protect the corian. The installer also never sealed the sink basin. Which we found out the hard way when our sink overflowed. The installer/builder takes no blame Won't even come to look or tell us what we can do. There is a ten year warranty on the corian, we've been fighting this for over two years now. The ten year warranty will be up in September of this year. What can we do???

I can tell you that a waterfall resting directly on a floating LVP floor will definitely cause issues. After a full year we have major flooring issues with buckling around the waterfall area. That’s what you get for hiring a cheap contractor that doesn’t think these things through. I am now renovating another property and thinking this through ahead of time and found this thread on what to do. It sounds like the stainless steel button should do the trick and be totally hidden. This should allow the floating floor to slide underneath the waterfall edge and allow for an expansion gap while keeping everything hidden without the use of caulking.