Cinnamon mead recipe

This is a cinnamon mead recipe I'm brewing at experimental size at the moment.
Inspired by a recipe by George Timmermans but scaled down to experimental size.
Required equipment:
- 1.5 l PET bottle
- 2 l stockpot
- Hydrometer
- Thermometer
- Bung with airlock
Good to have equipment:
- Funnel
- Spoons
- Siphon
I used yeast M05 from mangrovejacks.com and vwp sterilizer.
To calculate the ABV you can use the formula:
(OG - FG) / 7.5 = ABV
OG : Original °Öchsle
FG : Final °Öchsle
After a total of 6 weeks of fermentation my result: (77 - 0) / 7.5 = 10.2667 ABV
Or this formula:
(OG - FG) x 131 = ABV
OG : Original Gravity
FG : Final Gravity
After a total of 6 weeks of fermentation my result: (1.077 - 1.000) x 131 = 10.087 ABV
Ingredients:
- 1.5 litre Water
- 450g Honey
- 5 g Mead yeast
- 2-3 sticks Cinnamon
Instructions:
Clean and wash a 1.5 liter PET-bottle
Fill the bottle with water and sterilizer
Wait 10 minutes.
Wash the stockpot.
Pour the sterilized water from the PET bottle in the stockpot.
Wash two spoons, a funnel, a hydrometer, a thermometer, a bung and an airlock.
Put the equipment in the stockpot with the sterilized water.
Wait 10 minutes and rinse the equipment thoroughly and put them in a dish rack.
Dissolve the honey with 1.5 l new fresh spring water in the stockpot, heat the water to a max ~32°C to dissolve the honey completely.
Wait for the honey water mix to cool down below 20°C and measure the gravity with a hydrometer. I got +77 °Öchsle ( = 1.077 Specific Gravity)
Pour the honey water mix in to the PET bottle.
Pour the yeast in the PET bottle and put on the bung with airlock.
Let it ferment for a week.
Measure the gravity with a hydrometer. I got +5 °Öchsle ( = 1.005 Specific Gravity)
Add 2-3 sticks of cinnamon.
Let it ferment for at least three more weeks.
Measure the gravity with a hydrometer.
Transfer into smaller glas bottles. Drink, enjoy and scold in the company of good friends!