Starfish plant, discount bin success

I'm quite proud of this one. I usually only buy discounted plants - because if / when I kill them, I don't feel that guilty.

When I got it, it was a mess: had a baby offshoot and was rotting from one arm/leaf. I was afraid cutting it - it took me two cuts til it dried out and started it's recovery.
Now my problem is to try to keep it's arms straight - haven't found a solution yet.