Thanks for the quick response. I have tried to do that. I'll try to explain the process and maybe figure out what I missed.
1. I created drawing of the instrument
2. I converted it to a symbol
3. I selected the symbol and opened the spotlight menu , from there I went Object Conversion to convert to instrument.
This worked as expected, my new symbol was now a fixture but...
4. When I double click on my symbol in the resource browser and then click into my drawing, the symbol is placed as expected, but... this instance is not an instrument.
Somehow I am missing a step(s) to make the conversion effect the global template that is the nexera symbol.
Does this help at all?