I've been trying to programme some of the locos that I have had chipped with various success. Even the spotty geeky teenagers at the club have had problems so it appears that it isn't just me. Problems encountered included not being able to read the factory preset address, not able to programme a particular address but the chip had accepted a different address to the address programmed, appeared to have programmed the loco but then can't read the address or the factory default. All the locos apparently have the same chip but some we can programme as 4 digit and others as only 2 digit. Given that it took all evening and failed tp programme over half the locos either we are doing something wrong, the Digitrax unit is suspect or the chips are suspect. Does anybody else encounter these problems or is this just me.