Home Made Table Sleds Question.

I am entering the world of box making and have just made my first cross cut sled, I would also like to make a mitre sled and a mitre key sled/jig.



So, forgive me for what may seem like a stupid question. Would it be practical to adapt the cross cut sled for mitres, by that I mean run a 45 Degree channel in the sled table as well as the 90 degree one already there?



I suspect the result would be a much larger gap in the table of the sled which may cause problems with small work?



Or would it be more practical just make another sled for mitre cuts?



Thanks for looking.