I use an Accumaster to level both imaging rigs ( 8” Carbon fibre Newt with EQ6-R pro mount and 10” Carbon fibre Newt with EQ8-R pro mount ) and visual rig ( SW 12” f5 Goto Dob )
Extremely accurate !!
https://calculatorking.com.au/produc...al-angle-gauge
Stop using the bubble level type leveller about 5 years ago
Martin