69 road runner glass deck lid,anyone use one before?

I used 1 on my race car for awhile.
fit was good and finish was good but after sitting in the sun at the track the lid got waves in it. It actually warped from the suns heat.

I took it off and put a stock steel 1 back on.
I like the straight panel look better.

I had mine listed for sale awile ago but still have it.
I won't buy another 1 again.
David