I think I have everything I need. It's just a matter of getting everything in the right place, and in the right order!
There are some wonderful words on the paperwork supplied with the cartridge:
"You are allowed to remove briefly the stylus guard and gloat over your jewel-like new acquisition. We respectfully suggest you do this while the cartridge is still secured to its box. [I forgot to mention the stunning, gorgeous, perfectly made polished wooden box the cartidge s shipped in.] When you feel temporarily adequately fulfilled, kindly refit the guard very carefully, leave it in place until further notice, and follow these instructions implcitly."
Oh. That's OK then. At least I don't have to ask permission!