I have a 4' long and 24" high , wooden viv and I also have a spare viv around 30" long and 24" high but I'm contemplating joining them together to make more room . Can't decide wether to add it on to the cool end and make a nice long viv ( although space is tight ) OR maybe stick it on TOP of the cool end which would still provide extra space but also give the snake some exercise ??

Any thoughts ??