You will not be able to shop this quote around. Dupont only sells Zodiaq to authorized fabricators that it trains and certifies. Therefore, there will be an extremely limited pool who could even supply and fabricate your desired top. You will need to find out who those fabricators are and merely supply them with a diagram of the desired counter with the depths indicated as well as the edging, appliance locations, and the sink used with the reveal you want. Standard counter depth is 25.5 not 26.5, so if that is what you want, you need to emphasise the fact that it's NOT a mis-print. Your square footage is also drastically off if you want this as a single piece. You'll need to calculate the entire piece as a giant rectangle, which means the square footage that needs to be cut from the slab is 53 square feet, or roughly double what you are indicating. Also, to do what you want with the farm sink and corer in one piece, every fabricator that I have ever dealt with would require a signed waiver stating that they will not be responsible if the counter breaks in transport and that you will pay for an entire new slab to be fabricated should that occur. Instead, I'd opt for a seam to either side at the rear of the farm sink so that small skinny piece wouldn't break, as well as a seam at the L. Seams in quartz are extremely inconspicuous and will not pose the same "matching" issue that you can have with granite. Here's an example of a one page document that is clear about what you want and expect. No use in discussing the visibility of seams on a quote request. That's an in person judgement call for you to make after you view their work.

Thank you all very much for your responses. Featherbee and DrB I think getting one more quote is a good idea. It can't hurt anything. I told our contractor today I was thinking I might get another quote. KitchenPlace, thank you also. It might get me if I have to go up to 3 slabs because I'll have to purchase it all of course but then I'll have extra to go up the wall behind the cooktop. I'm trying to see the silver lining if I have to go up in price!

The escutcheon will cover it. Relax please. I had a newbie bounce a diamond bit across a countertop earlier this week. I fixed it before the customer ever saw it and he never will.

Bri: Your seam should be centered in the sink. It would be much less conspicuous. Fabricators cut for yield when they can get away with it as it makes them more money; your guys took a shot and lost. Post a dimensioned drawing of your layout please. If they had to add the end piece, at least they could have used a Seam Phantom and adhesive manufacturer recommended color adhesive. Had they done so, your seam would be much more inconspicuous. Their guy was color blind or used clear adhesive which appears as the medium gray you show or both. Whites are notoriously difficult to seam inconspicuously with the correct color match adhesive. Do not let them tell you they can't/won't seam at the sink. When your sink is strapped, not clipped, in place, it's one of the strongest areas of your top. Do not let them "buff" the seam. Buffing won't change the adhesive color or the thickness of the seam, however, it can create a noticeable dip and a mismatched finish. Matching factory finish on decks is in the very advanced class and judging by the work on your job, they don't have anyone at that level. That seam placement is not to industry standards; you are not at fault in any way.