Yes it is Cop, when ever you want you just use you original rebuildable part.
But there is more to it then this.
The way we fill the juice,
The way we use our comfortable air control ring,
The fun to work with juice control,
Those features are like no other,
it a GG signature all over the device
I don't know yet if I always will want to use this new rebuildable part
For all my Ithakas or my all juice,
I just want to have the option,maybe for cotton setups or something els
Or micro coils,but I have big quantity of pre made wires so making new coils
On old rebuildable part are no time for me?
Will see,it just fun to have all option available,we were not use to that ever in one device.