Digital BW, The Print

hi,

just wondering if anybody has made big prints by tiling smaller prints?

My son had an idea: he took one of my pictures, in elements split the 
picture to 4 and inverted two of them. I then printed the four 
bw-pictures in A4 size, and he mounted the prints in cardboard leaving 
one inch gap between the pictures. The result looks quite nice and it's big.

Tiling super-B size prints makes it possible to create even larger 
image. How about taping the prints without the gap? Would the seam be 
too visible? Any tips?

thanks

-matti