With all the centenary sides in place, I've turned my attention to the Airfix break and composite's window frames.

Each composite needs 10 ventilators (of 3 different sizes) while the break needs 5, in other words a lot...

My first attempt uses 20 thou evergreen strip, a template was roughly drawn on the workbench showing where each bar should be fixed. Plastic weld was applied to the strip and then pressed into place. It sort of worked, but didn't give a good bond along the length of the plastic. This required a touch up with the glue, which frosted the glass (and would have spoiled the paint)

The plan is to now test the same approach with Evostick and also PVA and see if a satisfactory bond can be achieved without damaging the window. The plan is that the strip will be painted prior to gluing on.

The second issue is time and consistency, it took a lot of care just to make a rough prototype from strip, and the thought of making the quantity required fills me with dread. I'm thinking about looking at the options to either get a batch laser cut or etched. (Another case of wishing I'd bought one of one silhouette cutters.). At the end of the day I suspect it may well end up cheaper to just buy the Comet sides and rebuild the coaches.