Soft top - do they stretch over time - tension adjustable

[markedgar5]

I am planning on installing my soft top soon and trying to come up with a way to avoid drilling in header. Love the idea another member had and will buy one as soon as they become available. In the meantime I am looking for a hardtop I can cut down to use the leading edge. If I do this will the top stretch over time and should I mount the snap bracket so it adjusts the tension?
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