You can make your own lensboards out of 1/8" hardboard. I have a 23C and a 45MXC. I use the 23C for colour, and the 45MXC for B&W. Not only are the lensboards interchangeable between the two enlargers, the lensboards also fit one of my speed graphics. Some enlarging lenses are surprisingly good when used as a taking lens. Most are so-so, and some are just plain terrible. Make yourself some lensboards and buy some cheap enlarging lenses and have fun!