after service, crown doesn't screw down flush

[zimv20ca]

i just got my watch back from RSC and i see that the crown is no longer flush when screwed down. it was flush before.

they did replace the crown and tube, along w/ doing a full factory service. i unscrewed the crown to set the time and screwed it back down, it did indeed stop short of flush.

i'm asking if this is within tolerance or if i should have them fix it.

sorry for the crappy photo, but i think it gets the point across.