Bassphil, you don't need to drill and mount a second arm. Just buy an additional arm tube (really the arm w/o the mounting base) for your JMW. No muss, no fuss. Undo the wire at the junction box and just lift off the tube - do the same in reverse for the 2nd tube. I routinely change from my stereo cartrisge to mono in about 5 seconds or less.
Are you using a JMW 10" (original) arm? I picked up a good cond. used arm tube on eBay for (I think) $195 about a year ago. Parts for the newer .5 and SS arms will undoubtedly cost more...
Are you using a JMW 10" (original) arm? I picked up a good cond. used arm tube on eBay for (I think) $195 about a year ago. Parts for the newer .5 and SS arms will undoubtedly cost more...