Karma Tennis
Legend
Put a starting clamp on the outside of the 1st cross and work your way down. At the end pull tension on the 1st cross, remove the starting clamp and tie it off like a normal tie off.
Why complete all the crosses before going back to the top cross and finishing the job? There is a small risk the Starting Clamp might slip. The longer the Starting Clamp is in play the more chance it will slip. I understand if it slips it will probably make little difference to the overall tension of the bed. But would not it be better to finish the top cross asap, perhaps after tensioning the 3rd cross and clamping it on the opposite side of the hoop? (Personally, I prefer to get the Starting Clamp off the frame asap.)