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Hi alfon1917, The point of the C.O.G is fixed depending on the height of the cantilever arm. Due to the size of most pots being greater than the point of COG, it isn't that critical. You can move the pot left or right a bit off the COG and it still stays up... I have had no issues with watering my potted plant which now has its home on it (after my adult son knocked the fish bowl off while swinging a rope inside)Highly recommend giving it a try... 😊

Lol... Very true alfon1917... None here in Brisbane metro area, Australia since I was born... I don't think too much stays standing when a real earthquake hits anyway... Have a great day and thanks for commenting... 😃

Thanks... I am thinking of making his adventures into children's online books to encourage them to explore the outdoors more... Take him on road trips and the like...😊

Good job, nice to see some recycling happening..

Thanks for adding a more detailed explanation for the readers... Excellent, I really appreciate it... 😃👍

It sure is...

Hi Canadaguy1959... I don't think I will be using this version for my big tank, it was more proof of concept for me than anything... Good point with stability... I gave it the wobble test and slight bump test and with water in the bowl it was fine... No water int he bowl and it teated and almost fell due to not enough down force on it... because it uses gravity to hold it in place,the more weight , the more stable... My plans for the big tank are two railway sleepers with a two foot wide footprint. that will give it enough stability unless someone crash tackle it... Thanks for the comment and taking interest in my project!

Hi Mindfulone.....The concept works on the centre of gravity and cantilever principles. The higher up the anchoring beam the platform, the further out the centre of gravity is. That is why when in the higher position, the bowl or plant is further out "on the limb"...It is more stable the lower the limb which makes it a viable addition to a stable surface. the weight that is applied "Holds" the whole structure in position. I tested this piece out with over 30kg of weight and it held up. A simplified answer, but I hope that helps. Thanks for your comment and question...

Thanks Penolopy :)

Hi Moosh, Great to see you on instructables... I love the viking stargazer chairs... As for the watering situation for your wife, that would not be an issue. I have had 30kg on the small one I made and if the plant is placed at the lower position rather than the higher one, it will be more stable... Once in place, you can water to your hearts content... fluctuations of weight will not matter as long as the initial weight has enough down force form gravity to hold it all in place. For extra stability, use timber that is both wider and thicker than what I have... Have fun!