finally got around to ordering https://www.leisureshopdirect.com/ventil...for-remi-blinds eriba 2000 era
had previously glued the little lug on side, did not last excessive gravity.
the new part arrived via royal mail, there's a screw on wall to undo then one in the channel to hold the cap on
fit new cap to channel on worktop, then back at window lined the net and blind back up in channels screw lug to wall, test.
found this fairly easy.
will add photo tomorrow forgot camera

remis blind cap.JPG - Bild entfernt (keine Rechte)

remis blind cap fitted.JPG - Bild entfernt (keine Rechte)

pictures above as promised

door fly screen as am on move added these here fitted to 2000 era short door curvy roof
like say the middle bar has mind of own it does sit level when remember to

how flyscreen fit to door.JPG - Bild entfernt (keine Rechte)
how flyscreen fitted to door.JPG - Bild entfernt (keine Rechte)
fly screen parked.JPG - Bild entfernt (keine Rechte)
hope helps

the stop on the right seems to be missing or broke,

its there just did not notice not straight was holding the blind with its very spring spring. bah heck someone tightened it, like doing press ups now.