modding LedLenser p7.2 into 18650 zoomie......

Just wondering if anyone has tried/done this before….

I have a P7.2 here which is of little use to me given my current flashlights – But i’d love a decent 18650 zoomie….

I’m looking at the bare p7.2 and thinking ‘ a convoy S2+ would slide right in here……’

Surely its not that easy?