Hi Rattler,
I'm sure it would, but I like the screw and vise grips method better for a couple of reasons.
One, the screw and vise grips seem a little more solid and less danger of the string breaking or slipping through my fat fingers and falling to the truck floor. The vise grips certainly won't fit through the slot.
Two, it seems like you can exert more pressure on the underside of the roof with the vise grips than with the string; and
Three, with the string, you'd have to hold the truck with one hand and pull upwards on the string for 5 minutes while the epoxy set (not my idea of a fun way to spend 5 minutes). With the vise grips I just turned the truck upside down and let the weight of the grips do the heavy work. In fact, I could have rigged up a system where the ends of the truck rested on two tall boxes and the grips just hung down between them for 5 minutes while I did something else or hung the underside of the truck from a lamp or something similar and done the same thing.
I'm sure there are other ways to skin the cat - this one just worked for me.
