If you are going to replace
a) SF P60 lamp with a 3rd party LED dropin
b) SF body with a leefy body in order to use rechargable batteries
c) SF tailcap with a 3rd party tailcap
At the end of the replacement exercise, you had a Frankenstein light.
On the same note, why buy an incan light when what you really want is an LED light?
I find it very strange that some folks here buy SF 6P or 9P and convert them to a LED light with a 3rd party dropin. Or some folks who want to convert the main incan bulb in a SF A2 to LED, won't it be easier just to get a SF U2 instead.
I believe it would be cheaper to use one of those "....fire" as host for modding purpose.