Just found this thread, in fact I thought about doing this yesterday, the local people here usually work on the option below, either flat, or with an angle. Next time if I find variegated seed pods, I will try to graft the same. The success rate is very low, I will be happy if I can get 1 out of 5.
Super glue is very risky, it can easily sip into the grafted area. I am thinking of using some plastic clips used for laundry to hold it.
