No problem. I think K1 is great stuff. It just requires a lot more room than what you have available.
Btw, if you change your mind about looking for a cheap 55, here is a picture of my sump that I just installed the baffles in last weekend.
View attachment 1194418
The left chamber will be full of ceramic rings with filter floss/sponges on top for mechanical. The middle will be a refugium area, and will house the heaters. Then the right section will be for the return pumps.