I am trying to make a full sheet cake.  My biggest Magic Line pan is 9x13.  Could I just make four and put them together or would this be too unstable/crack when it's frosted, etc?  I could buy and use  a different brand/cheaper half sheet pan, but I love how even the Magic Lines makes everything!  Also, how do I transport the cake to its destination without breaking?

AIt will be fine as long as it is on a sturdy board. A cake drum made of Masonite or a cardboard cake drum from a cake supply shop. The cracking will occur if the board it's on bends. I ❤️ Magic line too!