First and foremost, you can get plenty of answers right here on an excellent White's Main metal Detecting Forum. What M6 users have to do, like everyone else, is ASK questions and include needed specifics so others can supply some helpful answers.
There's another reason, too. That is the slow or sluggish acceptance for the M6. Let's face it, the M6 is touted (by many avid White's Dealers) as being essentially an MXT with a few things eliminated and a Tone ID feature added. The Matrix M6 has a suggested retail just $100 less than the MXT which is a proven unit with a lot more to offer in the way of performance and visual TID information.
The Matrix M6 was introduced quite a while ago, by some standards of observation, yet is really just getting a fair amount of Forum print. Minelab's X-Terra series, which came with one model, the X-Terra 50 and was quickly followed by the X-T 30 and now the X-T 70, is just that. A "series" that was quickly accepted, got a LOT of talk and action on the Forums. Far more than the Matrix M6.
But you don't have to have a "series" if it is really that popular. Heck, look at the Garrett Forum and you'll see that a simple, turn-on-and-go $250 (suggested retail) model has virtually captured all of the Forum discussions since shortly after it was released. Far more, and I mean FAR MORE, than ANY White's model has.
I think the M6 owners can get all the valuable help they might need or want right here on this forum. I mean, really, in a way if is just a lesser-featured MXT in many ways, even though it is also a little bit different. I don't think there is enough serious interest in the M6 to support the idea of a separate forum just for its users.
Just my opinions, but I have looked at the relatively few M6 posts (by comparison) and note that those who might benefit from some 'help' would really simply be better off with posting Q&A's on this or the MXT forum.
Monte
PS: I tried the Matrix M6 enough to know that while it is an 'OK' detector, it isn't anything magic, nothing that is a noteworthy advancement of anything else they are doing, and could have been named MXT Junior. It didn't impress me enough to invest in one and I am waiting for White's next upper-end replacement. I hope they get bring us something good. I hated to see the Classic series and the XL Pro go, and I am going to miss the XLT, but we can always hope that there's something special in the works from on of the industry's finest manufacturers.