All the info you ever wanted and more.
Basically nothing needed but blades. I like the larger bolts the different grips get you. Same bearings all fit. been running mine with stock gears just lowered my rpms.
Super light loading if you go full stretch. Old 500 boom and belt adds basically 2" or 40 mm so I went as far as the 523 or 525 switch and totally love it. You can auto like a 600 pretty much, disc so big tic tocs are nothing. Lower the head speed and you can get nice long flights. I fly mostly 1900-2000.
The other thing I prefer about the stretch is the belt is wider and fits the gear full width not like the skinny 480 stock.
I put larger tails on as well.
It's a super solid heli in either form 480/525 nothing but win IMO.
Might be worth waiting for the vtx and do nothing.
RPM is your friend..................................until you crash