i know ltk’s vex kit holder was good but i noticed something it couldnt hold that i had 
a extra large chassis (i got for christmas cause you could use up just about all the tank tread kit from how big it was)
anyway i found it at sears
its called the craftsman professional and it can hold any size chassis
not as many spots for screws but i like how long it so it can hold a lot of parts:D ex.wheels gears and motors cause my younger brother has vex too
will post pictures to show others in case someone else has a chassis thats too big for the other one
though this would help:)