WD500Z dim rate parameter set

I’ve tried my best to figure this out on my own, maybe somebody smarter than me knows. Is it possible to set the dim rate on the Linear WD500Z/Evolve dimmer switches? I tried just setting the parameter used by the Jasco/GE dimmers like this:

zwave.configurationV1.configurationSet(configurationValue: [1], parameterNumber: 9, size: 1).format()

…but it doesn’t change anything. It even sends back a message saying that parameter 9 is still [0].

Any advice? Hidden parameters I’m not finding?

I’ve been meaning to get in touch with linear to coax the full list of parameters from them. Would be nice to create a more robust devise type.