As usual, Miditech provides a solid product that does exactly what it says on the box, no questions asked. This solved all my midi issues, caused by having way to much stuff. Since it's a midi interface, and not a midi router, it requires me to have the computer started to play my rack synths, but the alternatives are more expensive, *and* has less ports.
One nitpick: The channels are numbered left to right on the front, as expected, but the actual outputs and inputs on the back go from right to left, as seen from the front. This means that the midicable position and the lights on the front do not match up. Which sometimes is confusing.
Also, this unit is an unusual 1.5 units high, so if you are planning to put it into a rack you might want to buy a 1/2U blank panel to avoid having an unsightly half unit hole in your rack.