I have been using my Axe091 for years. With that stated on many occasions I have experienced (what I thought were defective 18m2 + chips)as well as other picaxe chips. Due to the fact that on these occasions when downloading a program to my chips I would receive an error hardware not found. I could put a new chip in it's place and it would work. Naturally I thought the chip was to blame so I would on a later date try the suspect chip again and it would work. Also note the new chip would also behave the same way on other occasions. So it's not the chips, I made a program board with the Axe 029 kit and it always works perfectly. Even with the suspect chips as the pile started to grow. I would check for all the usual's on the board (091) and to no avail. I could however,using the same chip keep trying the download, and sometimes it would work with the 091. Has anyone seen these events as well as I? Any ideas?