Lets think about this. If you have 50 mls of 151, and you put in a 500 mg's of m1t you will have 10 mg's of m1t per ml. Just do the math.
Now about you crushing your pills, why would you do this. Suspending the powder in a liquid, and then taking it orally will not increase the effectiveness at all. The point of having the powder in pill form is to avoid what your going to have to do now.
Also there are other things in the pill to keep it together, and i'm not sure how this will effect your suspension. Maybe someone else can comment on this.
For 300mg's of m1t put it into 20 ml's of 151, and you will have 15 mg's/ml. Again i really don't understand why you would crush up your pills, and put them into a liquid form. Just doesn't make sense to me. I wouldn't make my m1t concentration quite this high as an effective dose can be found around 5-10 mg's.