I have owned KLH 40 since 1973. I originally purchased one in 1973 from Cramer Electronics in Boston. Had problems with the transport and the electronics. They replaced the deck 2 or 3 times. But none worked well. Then in 1974 I acquired 2 brand new transports, without the electronic, at a surplus outlet (B&E Enterprise). In 1975 KLH gave me for free the electronic box that mounts under the transport. It took me several months to fine tune the circuits and the transport logic. I have regularly used it since then. I have a collection of reel to reel's, but KLH 40 is the best. Even now, after nearly 45 years, it works perfectly. The only things I have changed are the heads (with the 2nd donor unit I'd acquired) and the transport push buttons. It is still in an absolute mint condition, in a walnut cabinet.