Interesting - are they planning to seat Y in between J and Y+?
Y/224 -> Y/262 is 38 seats, ie 4 full rows and then some. They can't possibly fit that in in the "minicabin", can they?
Also, that LH is 36 seats between doors 1 and 2 so if my new metric is valid, that is going to be a tight fitted J cabin.