Sorry Prospero, but I can't indulge your wish to end the thread just yet. And may I say that your v-grooves are beyond admirable. And stylish, too, which is something I don't consider your average closed v-groove to be.
Montacute, you said that you started this thread because you wanted some opinions but you didn't want your framer to resent you. This thread now has over four thousand viewings. I don't think the Grumble is a good place for customers to post and discuss a framer's work if you wish to remain anonymous. Here's a surprise. Picture framers read the Grumble. A framer who maybe just had an unhappy customer with regards to a v-groove is more than a little likely to open and read a thread called "are perfect v-grooves possible."
As a consumer, you have the right to have work done to whatever standard you wish. I think the right framer for you is a veteran of the industry, who runs a small shop and is likely the only framer. This person cuts v-grooves by hand and has for years and years. It is in many ways a dying art. The CMC has replaced a lot of the skill needed for this type of work but a CMC will not guarantee you a perfect mat. A CMC is only as good as the framer testing and calibrating it. It's a complicated piece of equipment that is fiddled with or not fiddled with to whatever standard the shop requires. This v-groove you posted is good enough for retail.
While I appreciate that you have sought out education, please remember that reading a hundred posts about v-grooves won't make you an expert and it doesn't make your framer bad. I submit to you that you need to learn to cut your own mats. Buy a fletcher or a mat cutter on a track, Bogframe's book on v-grooves, and invest about eighty hours of learning how to cut v-grooves so that you are always in control of your product. Or find a framer like I mentioned above.
There are two things no framer wants to hear, "I've been taking classes," and "my friend used to work at a frame shop and she said__________" If you had too many stitcheries to do before x-mas, would you hire out the labor and be surprised and/or disappointed that it wasn't the job that YOU would do? As a customer you have the right to demand any level of quality, but I would draw the line at posting grievances with a framer for any other framer to pick apart in public, which is what the Grumble is, very public. That's passive aggressive and it's why you got personal attacks.
I don't think that v-groove is bad. You do, and the right thing to do in my opinion is to remove the label and take it to some other framers in your area and discuss it with them, or solicit advice publicly and carry on a private conversation with a qualified responder over Private Message. You've made some friends through this thread who would be happy to help you find the right product. Please for sake of everyone of us who is running a business, don't use your classroom education to torment people in the field. That's not an attack, that's just me being blunt. Most of us to an overwhelming degree learned our trade by framing pictures and moved on to classes in advanced techniques much later. A new framer in my shop has framed forty pictures (supervised) in a week. You can't get that kind of experience without digging your hands in.
I think your framer would have been sad that she couldn't make you happy and have been willing to return your money, but now she's had her work picked apart publicly, viewed probably 3000 times and there's little hope for no resentment now. The thing that bothers me most about this thread is how quickly some of us jumped to throw this framer under the bus. We're the framer's colleagues, remember, we should all have some sympathy for her, not thanking somebody for being picky. Anybody can be picky.
Another thing about framers is that galleries and museums are ruined for us. Most of us can't even see art anymore without taking a good long look at the framing and finding all the flaws that the public can't even see. So asking a bunch of framers if "x" is acceptable will get you varied answers. Picking apart other framers work is what we do. It's part of growing. Everyone always thinks they can do better, like actors
Montacute, I extend to you a most sincere welcome to the Grumble. I hope that you continue your education and may I say that your stitchery is very, very pretty. I bet the back is as perfect as the front. I always admire the needlework customers that come in with perfect backs.