On my list of jobs for the new beast, now the weather is improving, is an ATF fluid/filter change. I have the gaskets, filter, fluid ... what I don't have is a "level surface" !!

Due to the geography of where I live, this job will be done on axle stands,  (4) .. the question is ... to get the best indications of "level" once its "up-in-the-air" ..  where are the best places to stick a spirit level ? I need to get both fore/aft and side/side.

Now just to complicate my thought process ( takes very little  !!) ... does doing it on axle stands, with the weight off the wheels so I can run through the gearbox as Mr Haynes says to do the final level check, make any difference ?? or should it actually be run up the road then re-jacked for the final level check ??

Advice and p*ss taking welcome .....