I would say that's a very dangerous combination. You have a wing that is tapered approximately 50% and your tip airfoil will definitely not have the same maximum lift as the 44xx series, which will invite stalling at the tip. From this picture,
http://www.ipmschile.cl/imagenes/Art.../Bombi%203.jpg
The root airfoil looks more like a 23xxx series. You could then use the 44xx series at the tip with reduced thickness. Full size airplanes like the B-25, T-6 and P-38 use a similar progression.