So... After some investigation it seems I understood but not solved) the issue.
The "male" part (2) coming from the "traditional" Morgan has a different milling (?) from the female one (1). Beside this the housing of (1) is not a snug fit. It seems that chrome arms (for Aero8) have a tighter fitting. We will try with those as soon as my dealer get them from the factory.
Meanwhile we did the arm bending and the thing got a little bit better. We did not make the rain-x treatment since we decide to wait for the new arms to better understand the difference.
2010 Violet Aero Supersports | 2012 Green Vantage S Roadster
That is very useful. The fit between 1 & 2 on your schematic is very poor on my Aero - there is a lot of play and I have solved it (temporarily) with gaffer tape. There is still a lot of play in the linkages which means that the 'rest' position of the wipers varies. The blades I sourced from ebay 28" BLACK Silicone Rubber Wiper Blades Refills 2 Pack £4.95 which you simply cut to fit. The securing clip will need enlarging You can just see the irregular filing that I did! Now 2/3 wipers are perfect and actually clear the screen, one still needs further tweaking. Good luck
I have solved it (temporarily) with gaffer tape. There is still a lot of play in the linkages which means that the 'rest' position of the wipers varies.
My plan is the following. 1. driving enjoying the sun 2. see what happens withe the chrome arms when/if they arrive 3. try to make it tighter by using what in Italy is named "teflon tape" (PTFE tape???)
2010 Violet Aero Supersports | 2012 Green Vantage S Roadster