Hello, First time post for me - have been able to get tons of advice from here so thank you for that. I have a Durst M370 englarger - my first. First question where and how can I buy a second 35mm negative carrier so I can print with a black border. Tried to make one but the light got in and it messed with the light readings etc. I want to buy a second one and file the edges back to make it larger. Secondly if I was to upgrade my enlarger what would your advice be - make & brand etc. My enlarger only has a 75w bulb does more light make a big difference? Many thanks in advance for your time and help - what an incredible place!