Here is how mine came out. The 911SC had solid side panels with perforated center panels from the factory so I tried to match that design.
Even with professional installation, they're not perfect (little bit of puckering around the bolsters, the seams look pulled too tight in a couple of places, piping on upper seatback edge has ripple, etc.) so no one would confuse them with $2,000 seat covers but they look nice in my daily driver. I think that I spent a total of $600 including installation. Most other seat covers were more than that just for the covers. Hope you are happy with your results.