Scuttle/Micro-Filter Fastners

[brucemillar]

Folks

I am trying to track down the 'correct' rivets/fastners for the Windscreen Scuttle on my 4.8is.

Right now I appear to have a mixture of thumb screws that have springs attached. These are the type that you push in a give a half a turn to lock. Then to to undo you reverse the process and watch as the screw disappears over your shoulder, fired by the spring.

Now, my local BMW parts guy tells me: I should have eight (x8) "expanding rivets, with eight grommets"

He see's no spring loaded screws? He is checking from the VIN & Reg number.

I have ordered these up but am curious as to what I should have?

It is possible that previous owner has substituted the "expanding rivets" with the "sprung screws" I do not know? Can anybody tell me what I should have please?

Oh the reason I need to know? At 55mph or above? The wind is making a noise like a howling banshee. It is the loose scuttle that is the culprit. Take it off, problem solved. But I need it on there, properly secured, if possible.