Thanks for the quick reply.
I'm not as worried about the extra work as I am the performance of the subs and also making more room in the space itself. Leaving them in the corner as is just intrudes into the room too much. Stacking them in the left corner is certainly an option if the performance doesn't suffer.
I was going to leave room around it to allow the sound room to come out and also place the rear facing outwards for adjustments. I can make a cover out of speaker cloth to hide it.