I had the issue with spacers falling out....
So I copyed Honda spacers which stay in place..
They have a small lip on one end of them that pushes though
the seal... The lip is only about 1.5mm high / 1.5mm long
but is enough to keep them in place...

__________________
Harley Davidson..
The easyest way to turn gasoline into noise with out the side efect of horse power...