Hi John, and welcome!
You should get many replies to your query. There are several guys with several great methods who contribute to the forum.
Personally, I use an over arm pin router (router mounted on an arm above a table with a pin in it) to follow a pattern. Depending on their sizes, I can duplicate several different parts at one time.
No need for collars and offsets or pattern/trim bits. Just a 1/4" spiral and a 1/4" pin.
'The true soldier fights not because he hates what is in front of him, but because he loves what is behind him.' G. K. Chesterton
Please edit your profile with a name and location so we can better assist you and make for a friendlier forum.