No, haven't heard of anyone doing it but maybe someone has.
Maybe it's me, since I never liked or got used to over smoked foods, but I get plenty of smoke in the FE with the low temp, higher temp method.
I think there are other options to try, I've seen the sawdust trays that seem to be better (and cheaper) and where people build a little rack over the fire to burn wood.
Hey, if you need more smoke, I understand, but I'll defer to those trying to add devices. There have been some recent posts on this, so keep reading.