Gauge fitting questions TD42i

[Cuppa]

My Genie exhaust system has arrived & I’ve realised that if I am going to fit a pyro gauge it would make sense to do this prior to installing the pipe. Because there seems like there is little option to fit the gauge neatly other than a pillar pod it’s looking increasingly likely that I’ll end up fitting two gauges so I don’t have a pillar pod with an empty position.

The two gauges that are currently in my sights are Redarc (previously Autron) LCD items - the EGT & Boost (G52-EB) , and the Oil pressure/Coolant temperature (G52-PWT).

All are supplied with ⅛” NPT threaded sensors.

1. The Genie exhaust has a ¼” BSP threaded Pyro boss. Is it acceptable to use a ¼”BSP to ⅛”NPT adaptor & is there a preferred material for the adaptor? (I’ve only seen brass)

2. Where would I fit oil pressure & coolant temperature sensors on the TD42i? Would I need adaptors to be able to use the ⅛”NPT sensors? (Hoping the air bleed threaded hole on the thermostat housing isn’t needed for the temp gauge as I’m already utilising it for my low coolant alarm)

3. Where does the boost gauge attach to? Is there already a take off point or is drilling & tapping somewhere required?