Tie-In Point in solidworks drawings

Hi Friends,

I am preparing some pressure vessel drawing using solidworks 2012.

I need a help in some markings as mentioned in the below image.

How can i make these marks in solidworks.

I tried to make blocks, but it does not work good, because if I change one block then all the block changes.

I used sketch and text for this mark, but when i add or remove some dimensions I have to re-arrange all the tie-in marks accordingly.

Kindly help me. Thank you in advance.

SolidworksDrawings And Detailing