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I am sorry to hear that you ran out of options regarding Jamestown mattress, but I would not jump to conclusions that they did not want to have anything to do with you. From what you describe it looks more like they did their best to find something that would be suitable for you and that you are limited by what this system has to offer. When you purchase a mattress there are many factors involved and even with all good intentions nobody can guarantee that a mattress will work for you with all the many variables involved that are unique to each person and only way to know for certain whether a mattress will be a good “match” for you in terms of PPP (Posture and alignment, Pressure relief, and Personal Preferences) is your own experience.
There would be no harm with trying a topper in combination with the mattress and I would not worry about “changing the system” if you found just the right topper/mattress combination to offer the comfort you need. Adding a topper as a way of increasing the plushness of a system is a popular ay of fixing a mattress If you decide to go this way there is more information about choosing a topper in [url= https://forum.mattressunderground.com/t/some-topper-help-appreciated]post #2 here[/url] and the topper guidelines it links to which along with a conversation with a reliable and knowledgeable supplier (that can provide you with good information about how their toppers compare to each other or to other toppers they are familiar with that are available on the market) can help you use your sleeping experience as a reference point and guideline to help you choose the type, thickness, and firmness for a topper that has the least possible risk and the best chance for success.
Because of the uncertainty involved with purchasing a topper where you can’t test the combination in person … a good exchange/return policy can also reduce the risk of an online topper purchase so I would also make sure you are comfortable with the options you have available after a purchase to exchange or return the topper and any costs involved just in case a topper you choose also doesn’t turn out as well as you hoped for.
Starting from scratch and looking for another system may be an option you may decide to pursue, but I would advise to first have a detailed conversation with any of the companies you are considering. As you may be aware, the companies you are mentioning are Trusted Members of this site, which means that I think very highly of them in terms of their quality, value, service, knowledge, and transparency. All of their mattresses use high quality materials and there are no lower quality materials or weak links in any of them so they would certainly make a great quality/value choice for the inner spring and latex combinations you are considering which may contour better around your body than the Jamestown system you tried and offer the comfort you need.
The Quadra flex is QuadCoil unit from Texas Pocket Springs, which is their own patented manufacturing process . The springs are arranged in quads, but as far as zoned pocketed spring units there are quite a few different ones (3 and 5 zones most commonly found) from various manufacturers but I do not provide such listings because of the difficulty in maintaining them in a retail landscape that is constantly changing,
Generally speaking zoning may further complicate your mattress selection, so I would certainly have a detailed conversation of any of our trusted members that you are considering to see if their zoning is something that might be right for your situation.
I think the extra day you would spend in Boston is well spent as nothing can replace your personal experience and the guidance of a manufacturer/retailer that has your best interests at heart.
There are few of our Trusted Members in the Boston-area who might offer some better options for you to sample they are also a site member here, and are very knowledgeable about latex/spring system and are only half an hour away from Boston.
At a quick glance here are few options from site members that you may wish to consider:
[url= http://gardnermattress.com/]Gardner Mattress[/url] ] with 4 showrooms (Agawam, Springfield, Northampton, Greenfield, MA) they carry all mattress types and can help you customize your mattress to meet your specific needs.
Yankee Mattress Factory 3 locations (MA Salem / Woburn / Newton) and their Black Collection has a latex spring options. LumaSleep (closed business as of 2023) carries customizable latex hybrid options.
I know this is not the simple answer, but I’ve tried my best to “drill down” and makes things as simple as possible to help guide you through this process.
Phoenix