Taran.J
This just came up to my mind, for the kidney grill, on the bottom 3 tab, do press the middle part. The clip is actually has dual function. The outer is for unlocking the outer chrome ring from the black slats piece, while the middle one is to unlock the center black slats from the bumper.
Maybe this can also help
Barbja .
As for the RaceChip or JB4. To clarify, the BMS has 2 different version. There is Stage 1 and there is JB4 Stage 2. The Stage 1 is the simplest of all, just 2 connector and you are done.
While the JB4 Stage 2, it has to be connected to the CAN wires where it can gives you better control on the AFR, Wastegate control, etc. to give you the better power output.
I personally don't know much about the RaceChip, but I would guess that the RaceChip falls in between the Stage 1 and JB4 Stage 2 on the performance wise.