Your BRT amaze me, that you get so much growth in such short time. Nice, the twin trunk will in time be great. Have you thought about bringing the two trunks closer together? Kick the thought around.
I know from seeing your big one's photos, you have a good handle on where to take this in the future. Fun project.
But do you really have room for more cuttings? Save room for other tropicals. Maybe something that flowers? Bottle brush would keep more or less with the BRT theme but red flowers for variety.