I received the new light trap seal, installed and here its a sample. I did it at home with all the lights on, but EV was 5.5-6, so I used my new cheap and light tripod with a 3D head, this first photo is at f2.8 and I did some more until f8 and 1 second, all with mirror look-up, it performed great, too dark anyway and with no natural light at all.
I did some other pictures at school at daylight so the new light trap seal is there, I guess one day I will have a surprise again so I got another set to install
On that commode I have the cameras with film inside and the fixing ones, Medalist II, Inos II and the Isollete III with new bellows waiting 24h to let the glue dry (already with film).
Thank you for watching and advices given.