The best method to clamp a Picture Frame

The best method to clamp a picture frame ready for joining is with a strap clamp. But the strap has to be made from metal strapping. Packageing tape clamps are not strong enough to hold the frame whilst joining.
You always should use a v-nail to join picture frames..and the reason is that v-nailing is easier than any other method. Glue alone is usually not strong or stable enough.
If you are joining useing a PushMaster, and the timber is hard then tap the end of the PushMaster with a hammer..but unless you are holding the frame firmly then the frame corners will collapse..so a strong clamp is essential.
Hobby picture framers need plenty of help. We are usually cutting our frames with a mitre saw so the corners are not as good as a professional guillotine cut. So before we join the whole frame, it is an advantage to see all the corners lined up together BEFORE you join the frame. With the FrameCo strap clamp you can do that. Strong metal band with an excellent tightening method for pulling up the strap really tightly . And you get to see all the corners before joining