There are a few problems with that setup (but I admire the clever effort).
Ask yourself:
How can you be sure that you're applying the same heat level, each time that you test? Specifically, is the knob that you're turning to turn on the burner, going to result in the same power output? How different can it be, each time you turn it on? Exactly how much power are you applying (in Watts), even roughly?
Then:
Since there's no applied mounting pressure (and I assume no TIM joint either), how do you know that you've made good contact? How do you know that you'll make the exact same contact the next time you're going to re-mount the block the next day, next week, next month?