22-11-2022, 05:36 PM
JonE, if I understand what you are saying, each seat cushion only has one tube(chamber). If that is the case, then it misses one of the key advantages of this type of cushion. The originals and the Purves reproductions had two chambers each. This meant the outer cushion could be inflated more than the inner, giving support at the front of the cushion while leaving the center more soft.
Erich in Mukilteo
Erich in Mukilteo