Please critique what I did. It did not come out very potent.

Used 4 grams of finely chopped chronic
Around 3 grams of stems from assorted strains
2.5 oz 151 Everclear

Placed pot on foil in preheated 325 oven for 5 minutes. came out a light brownish color noticed a small cloud of vapor escape when i opened the oven. I placed that immediately into a jar containing 151. I had previously heated the jar in water a bath with some water in it to 170. When the oven had 2 minutes to go i switched the water for 151. It got up to temp pretty quickly even after adding the pot since it was straight out of the oven. Had that going for 20 minutes. It stayed at a slight bubble. Temp was monitored by a digital meat thermometer, stayed 170-174. It was strained through very fine mesh and pressed well. I placed it in a small plastic bottle that had an dropper top. I figured this plastic should be ok since it had another sort of herbal extract in it previously. I let it cool and placed one full dropper into a half cup of poweraide and drank it. This was at 3:30pm, only thing I had to eat that day was a lunchable (meat, cheese, crackers) at around 11am. I started feeling some effects at 4:20 (haha), and it kept going up till 5pm when it peaked at only a half decent body buzz. It tapered off till 6pm when I decided it was time to go ahead and smoke.

Thing I think I could have done wrong:
Something in the poweraide inhibited it?
Since the 3 inch meat thermometer probe wasn't all the way submerged in something, the reading was off?
Maybe my oven got too hot? I had tested it earlier with the meat thermometer and preheated at 325 it would get upto 345 after the door was open for a several second period.

Let me know what you gurus think. I really need to find a smoking alternative. Now after years of smoking daily my inner ear starts hurting really bad after I smoke, like an ear infection.