Pulsar do a 1nm clicky torque wrench (Microglobe do them) which I use on my Wardy thermal 75/3 ...I also use a Wilko thumb wrench fitted with a 1/4” drive 13mm nut which lives in my jacket for when I change scopes up a high seat.....gives just the right amount of tension.
I’ve also used this thumb wrench on my Pard NV008 and proved the repeatability on that....
Cheap too! And there’s 3 in the packet.
They are showing as discontinued on line the other week but I noticed my local Wilkinson’s store had new stock this week.
Cheers
Fizz