LauraLynn-Your pieced work is beautiful! I have done 3 pixel tops, so I speak from little experience. This is what I do and so far it has worked. I used French fusible knit stabilizer, I've found as wide as 60" wide on the internet so two pieces sewn side by side would work great. Once I stabilized with the fusible knit, I created a matting and frame effect around them. The matting and frame work I've done in scale according to the size of the different pieced works. Hope this works. Continue the great work!