I index on 3 out of 4 engines in my fleet right now. With my turbo combo I swap plugs so often that it's impossible to keep indexing. the other 3 engines are bracket cars and go an entire season on 1 set of plugs so I spend the time to index.
I didn't see the HP show, but I use an index wheel/tool, makes it easy to index the plugs after you do it the first time.
one wheel/tool can do 2 engines. you can take the tool with you to the parts store and go through the plugs and pick out 8 that will work in your car...
what it looks like when your done: