I guess the answer depends on if you need an excuse to buy another razor lol

On the other hand $135 for a TI is a great price, even for a low end model, which surprises me due to AOS's usual prices. If you REALLY need an excuse () I'd say go for the TI and the lesson, but take the lesson for what it is - a guideline, not a written-in-stone rule. With experience you'll develop your own technique anyway.