Note to self & others who have to change the rack ends on a March K12, make sure you do not call the agents. They told me that my model didn't come with Rack Ends & I needed to replace the whole thing for 200k!! Got it done for 9k... Morons
Ya machan, apparently the 'model' I have it's a complete unit. Took it off, & it did look sealed. Have to admit I nearly soiled myself. But then took it to a lathe & got it separated. And the regular 555 rack end did the job.