Yeah, guess that is what we should have all expected. Have not taken my DT02 apart because it is still working. However, some of the other clone touch off sensors that are copies of expensive alternatives when opened up where also terrible construction inside the unit. The centroid touch off unit was like $600 or something which was more than I wanted to spend. Wow when dcgregan z axis came down it did not stop. When mine has crashed my servo gets over current when it hits something solid and the amplifier errors out and saves the machine. All my other axis limit switches actual connect in series to the enable leads of all the amps so when anyone faults the machine freezes. The z axis is harder to do in this method without something that requires adjustment on each tool change.
Russ