I was wondering if I added 2 of these MBMs: https://www.diysoundgroup.com/bundles/midbass-modules/mbm-15lx-kit.html would they not match up well with these guys that I already have: https://www.diysoundgroup.com/bundles/midbass-modules/mbm-12lx-kit.html I was thinking of the 15 inch ones because he only has 1 of the 12-LX kit. Or should I wait until 2 of the 12's are back in stock?