Zis-x,do you have a photo of the `inside` of the air-filter,as fitted to that gorgeous blue Gazelle ? I only flew Gazs with either the deflector,or just the plain mesh guard. I flew my first Gaz in Feb.`71,F-ZWRH,341-01,later, -ZWRL,-02,ZWRK-04,XW276-03 and -ZWRA-002 with SNIAS and CEV,and AAEE,later F-MBSF/-1038,then many UK ones on test and ferry. As posted earlier, `looks great in any dress`,even 40 years on,and ready to go dancing in the sky again..