Rear spring length question

I bought a slightly used WR250R from a much bigger guy. I have been told that he changed the preload on the rear shock among other stuff on the bike to  suit his weight.
According to  the manual the spring should measure between 206mm (max preload) to  216mm (minimum preload) with 211.5mm set from factory.
I found the spring to  be 205mm when I measured it on a stand with the rear wheel in the air. In the shop manual I found online it says that the spring length should be measured when the shock is on the bench.

My question is the measurement of the spring with the shock on the bench the same as is on the bike with the rear wheel in the air? I set it up to  211.5 mm with the bike on a stand with the rear wheel in the air till I have time to  adjust the sag with the help of a friend.

Thanks.

I think youre fine, you should be better off than before anyway.

But as you say, only way to do it is to meassure sag.

Jens Eskildsen wrote:

I think youre fine, you should be better off than before anyway.

But as you say, only way to do it is to meassure sag.

Thank you Jens Eskildsen