Cyra,
the hardest part for me is experimenting on my favorite plumeria. I have 10+ new plumerias I purchased late last year and I have not seen their blooms yet. I mostly experiment on My Hausten white because it gives me 4 to 5 branches after each blooms and the ones I grafted are from the ones that have 3 or more branches. I cut it long enough that if my experiment fails I can still root them. And I also leave enough length on the other plant that wherever I cut off, it has enough length to give out new branches. The way, I see it I'm giving it more chances to branch out.