I always thought they did that straight from the box.
I pretty much sold my soul to purchase a 410 back in the day and it was garbage. The best Mitchels I used were the diminutive little 206's.
Talk about Lure/Tackle ID's; Reminisce over bygone times and old fishing tackle
A 206 was the first Mitchell I got. A step up from a black prince. 12th birthday present from memory. Great little float and ledger reel and it wound my first double figure pike in (along with a Shakespeare ledger rod). Still got it and works fine decades later. Happy days!