I didn’t post the Thing as that was not changed. Its the standard Thing for a blind.
Regarding the STOP Alexa command. I am in discussion with the developer about how it might be done but I am not an expert. If anyone else here has an interest in this too please visit the Alexa skill thread and add your input:
Maybe @massi et al might have some better ideas than I on how to get the BTicino binding working better with the Alexa skill. In that case it would be good to discuss this now with the Alexa skill developer @jeshab while we have his attention 
eg There are also some discussions on Alexa issues with dimmers but I myself haven’t played with that part yet. eg Increase, Decrease commands.