Nitrous plumbing A1A...??..

I think I would like to look at a timing controller.. I like the idea of retarding the timing just during the nitrous hit.. especially if I only plan to hit it for a couple seconds here or there.. I'm not sure if I like the idea of being 6 degrees down on timing three-quarters of my run...
I looked at the MSD but I'm not sure if this other one is the same thing? What damage do you need to buy two different units it looks like?
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