Hi
@Bluntsallday! I would do it the same day, if you're confident about the rempotting. Indeed, a properly done transplantation has no impact at all on the growth, if you do it correctly your plant won't even notice. FIMing however is a serious surgery operation and will necessarily generate stress, plant will need a few days to understand what's happening, re-drive its apical dominance, and recover / create new growth. Hope this will help, keep us up-to-date and happy growing 👊