Hi Erik,

I don't think it should have a problem with the 72730 as I believe that they are just on/off swiches. I don't know about the signal though. What you may have to watch out for is the capacitors on feeder tracks and I am not sure what effect the device has on capacitors in the loco.s. Perhaps drop GM an email http://www.gaugemaster.com/contact.asp as they are also the main distributor for Marklin in the UK, so they should know.

Carim

Gaugemaster replied to my email and they wrote that the capacitor in the feeder track would turn off the track cleaner, and the capacitor in the locomotives will also turn off the track cleaner, but that will only happen when electrical contact is restored.
They also wrote that the 8940 semaphore might not be compatible with the track cleaner.

So the question remains if the HF-2 is compatible with block sections controlled by signals

I would also like to know what kind of power source I should get for it (the website tells me that the recommended power source is the gaugemaster M1 transformer, but the description of the M1 tells me that the M4 transformer is designed for z scale)