I use this case to house some simple household controllers such as clock multiplier, clock divider, mults, cv midi converter and theremin ribbon controller. Room to spare for sure. Negative point is that the transformer is not vertically placed inside, thus about 6te very shallow space left at the far right side. Other than that, case is very well milspec built. Must know: the screws or knurls must be 3mm, not 2.5mm. That should have been specified in the product description.