The ornamental design for a martialartsboard to support stand, as shown and described.
FIG. 1 is a perspective view of a martial arts board support stand,
embodying my new design, showing the arm receiving notches;
FIG. 2 is a front elevational view thereof, in which the front notches as
well as the rear arm receiving notches are visible;
FIG. 3 is a left side elevational view thereof, in which the front arm
receiving notches are visible; and,
FIG. 4 is a top plan view thereof.
The right side of the support stand is understood to be a mirror image of
what is depicted in FIG. 3. The rear side as well as the bottom of the
support stand are plain and unadorned, and the appearance of these
portions is not significant.