My longest narrow strip was 46". The cut didn't stay on the score, so I had to start over with a larger piece of glass. Throughout my other cuts, three others required the removal of thin strips (they were under 20"). All failed. I actually had to dip into my reserves of old tank glass because of the failures.
With no pieces left for backup, I had one more cut. It was another thin strip.
I clamped aluminum supports to the top and bottom of the thin section, and...it worked. The strip was about 1.5"x14". For your longer pieces, I would suggest angle iron or C-channel to support the strips. In the past I have had good success with run and nip pliers (about 80% success)