The outer dimensions of the box are exactly 5" x 6" in length and width, and about 5" high including the heat sink. The opening in the bottom is just a hair over 4" by 5". I think you could make an adapter to non-destructively fit it to your 45MX. Is it possible to remove entirely the enlarger's upper bellows so that the lamp house may rest directly on the negative carrier? If so, the project would be very easy. If not, then your idea of constructing a spacer plate seems feasible. There may even be a small market for such a device as it would work for the Model 2 lamp house as well.
Originally Posted by PKM-25