Just a small update to the boarder issue when using 27"x40" posters on my 27"x41 sexy slim frames
I ditched my original idea of using slim black cardboard and found someone selling book repair tape on Amazon, it's ideal really as it's self-adhesive and acid-free.
Here are some pics of it being applied and finished>
Packaging, Note 3cm is the perfect width for 40" posters.
Applying:
Close up of tape applied, Note the tape looks a bit gray in this shot but it's really jet black and you can see it's made of material/pattern which you can't see from distance/hanging:
Poster hanging with black repair tape at top and close up on second pic:
This is probably the best solution for using 40" posters on 41" frames, I've ordered 2 more repair tapes for my other 2 frames
https://www.amazon.co.uk/gp/product/B00HYV93B0/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1