Balanced foot for tripods

This is a sketch of a rounded tripod feet to be used on hard surfaces, such as tiles, do not recommended for outdoors use, specially over irregular or soft floors as it will introduce more instability.

Foot adapter sizes are estimated and do not correpond to an actual tripod model.

Edit1: added actual size for my SkyWatcher tripod.

Edit2: this a failed design. The lower part needs to be bigger. I increased it 5% and it was still too weak, it breaks when the ball of the upper part is inserted. It is difficult to remove the lower part from the bed if supports are used, they are not necessary though, indeed it may break in two in the process. I leave it here in case someone wants to reuse it.

Edit3: I've added the v2 for my Skywatcher tripod with the 5% oversize and reinforced throat for the foot. Now it works as intended, I can insert the ball of the upper part without breaking the foot. I added a picture of 2 of them (with some stringing), foot is v2 design and upper part i