good questions.
we make the lens only. so its up to you guys to detach your old lens from the housing and install the new ones. its really pretty simple. simply heat up with a heat gun or put it in the oven for a while. its still a diy project but its the only way i can produce them, and its still affordable for the buyers.
the lens are made of a high quality resin, we pay the extra money to get the uv protected stuff so they are garantied to never yellow.
