My Lipo never caught fire. But it MAY have been responsible for tearing up my SCARS' piston. Maybe.
That is something you want to look at, 'Mints. These things turn your gun into a monster, and like a monster, they tend to break/damage things easier. If you've got a good gearbox, with good internal parts, that is configured properly (lube where you need it, shimmed well, cleaned, etc.), you shouldn't have too much of a problem with having to replace parts (or so I hear).