Using the UC instead of a triangle

Has anyone summoned a spirit INTO the UC instead of a triangle. It is mentioned in the BoA that this can be done,and I was wondering if the “welcoming message” inscribed on the UC would make it a better fit for this use.Any experiences?

The Universal Circle is NOT the same as the gateway in the BoA. I believe EA said somewhere that it has been changed a bit, and a mediator spirit has been bound to it. It should not be used in place of a triangle. It is designed to be used WITHOUT a triangle at all.

Thanks for your input DarkestKnight.Being it has the same markings as the gateway of pacts I figurd it could be used as such.And as for the bound spirit I was just wondering if it would welcome the spirit into the circle.