Continuing today - to renew frames that would be seen under the canvas and expanding it over the fuselage, I've used Tamiya tape and thinned Mr. Surfacer. After it dried, I lightly sanded it to soften edges.
I didn't do it on Bertholds plane because fuselage halves didn't match as should, so for me the best thing was just to lightly sand joint seam and hope that it shall be OK when painted and weathered...
Next thing was to apply Parts etched stitching on both, and fuselages are now ready for painting...
Back to the issue with lower wings - I've cut one wing in two to check the gap (seen on the 3rd pic
). Right now I'm thinking how to fill it
... Only now I've cut the other lower wing from the sprue, and you can see how badly Roden molded it... Luckily, nothing that sanding couldn't correct...
Tomorrow I expect to gloss coat all the wings and start working on lozenge...