ODC 420, foam seat or inflatable?

[Steve_IA]

After having now owned an ODC 420 for a couple of years, my primary concern deciding between the air or foam cushioned models would be the stiffness of the seat back. My foam cushioned version was not stiff enough in the seat back for my comfort when kicking about and I added a sheet of plexiglass to the back as support (I think goddess may have provided the suggestion). I would wonder if the air cushioned model could provide as much stiffness as the foam and I certainly wouldn't want to settle for less.

Steve
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