rear wheel spacers, 5mm wider on one side, is this safe

[1303mark]

did another fit on my wheels last night,

with 25mm spacers on the rears, one side is clear one side fouls,

so i stick an extra 5mm on the foul side and it is now fine.

problem is can you safely run with 25mm spacers on one side and 30mm on the other, personally i dont see any immediate problems, but then I am probably too close the the project,

i could try an extra 5mmn on both sides, but i might foul the good fitting wheel,

any thoughts