Many people prefer to secure the tack to the boom. The reason for this is when you need to get main down and stowed in the boat, perhaps in a hurry. If the tack is still secured to the mast then this is more difficult, and chances are that before you can release the tack the wind has caught the sail.
If you are securing the tack to the boom watch out that the bolt rope still has a good angle into the mast groove – it should be close to vertical, so there is no tendency for the sail to pull out of the groove. As no disgrace mentions the position of the cringle is important.
Getting luff tension is then fairly easy with sweating the halyard a little.