the g5 is a g4 with different milling and modified bolt. the board and trigger are also different but everything works the same.
the DP grease is the problem, use whatever you use on the luxe. The trigger will be nice and comfy but the gun wont be as stretched out as the luxe, you may not like this
Yeti PB Balls Out Photography Becker Industries
DPOT: Hotter than a 2 peckered billy goat