aiah my is DIY solution which I prototype ..using a 4x5 cam as an enlarger will present its own set of problems like how to control contrast, how to prevent light leaks and spill. I have not further work on it since the last test.hhaa
A proper enlarger will work better. If you can get original bulb, then why not continue to use it? Just put a standing fan nearby too cool it down if its cooling system is not cooling it well enough. maybe considering getting a portable aircon.
