I used the MS250-24Ps as core switches and stacked them, creating a core switch stack. Then I used MS225-48FPs for the remaining switches.  I then created an access switch stack and used a twinax cable from the top of the stack to the first core switch and a twinax cable from the bottom of the stack to the second core switch, then i aggregated those ports so spanning tree wouldn't start discarding packets by preferring one link over the other.  Look at that stack action on the back!! lol