"Love paying extra"... nope, that's not it.
I'm just being realistic. Looking for DTA to make anything 100% is like the old shit in one hand, wish in the other and see which fills faster analogy.
If you want a truly unique system DTA offers that, but it comes at the cost of not being as refined or trouble free as other systems. Not trying to be a dick, but I'm not going to sugar coat it either. It is what it is and the entire DTA thread is filled with evidence of the trials and tribulations that can go along with these systems. If you're not willing/able to deal with those tribulations and/or solutions that go along with that uniqueness... Well, it might be a good time to admit that DTA might not be the right choice for you. In that case it's nice that you have options as something from AI is likely to make you much happier as they are quite a bit more refined and more likely to be 100% good to out of the box.
By the way, factory 7wsm conversions ship with the regular long action mag. Max coal 4".