...in the 52 I just sprayed them with windex and put one edge in and pushed the other down.
I had a set from a vendor in Missouri but decided to spring for the ones from Steele. I drove up to their place and paid dearly for the two wing vent rubbers and to be honest, I compared them and rubbed them and just could not justify buying this particular set from them if I do another. Not bad mouthing Steele one bit, just my observation/opinion.