D1 fan slight play

[landrover77]

]My disco's fan has some play in it, not much but it got me concerned
that it might get worse.
what is the best way to tighten the 1"1/2 nut without the belt moving
with it. I've heard of jamming a screwdriver in there (somewhere).

Is a little wiggle in the fan acceptable?

Note: Answer found, please disregard.