When buying a carpet, unbox it and roll it out on the floor somewhere right after it’s delivered. Repro carpets more often than not are made to order, so when you receive it, it’s only been rolled up and folded up in its shipping box for a few days. If you get it laid out flat, or install it right away after getting it, there’s little time for creases or lumps to set in the carpet.
ECS used to sell carpets laid flat for a premium price and higher shipping costs, but that extra cost could be saved by buying them direct from ACC and doing what I describe.
They don’t sell those laid flat carpets anymore anyway.