Yup of course 3 has rectangular side destos; it has
MKIV (mainly DM3500) cameos almost every weekend, and if
you're lucky, you'll see some on weekdays too. It's just too bad
that it doesn't have perm ones, I wonder why.. Most BNDEP services
have rectangular side destos. By the way is it really the first
time a VO3X Batch 3 has done 222?
This isn't the 1st time a Batch 3 VO is doing on S222. I've seen
SBS9614X (ex-BN 14) cameoing on S222, and I have photo of it, and
that was like early last year. 
S228 has got rectangular side destos. I've never seen S229 S292
S358 rectangular side destos before. S3 S38 had the destos since
they were introduced.