[KensRedZed]

Hello LHP,

There are many brass inserts available on the market.

https://www.professormotor.com/product-p/pmtr7012.htm

https://www.professormotor.com/product-p/pmtr7013.htm

The Evergreen styrene tubing is available at many hobbies shops.

https://evergreenscalemodels.com/collect...rene-tubes

I like to buy brass inserts by the box from Spaenaur out of Kitchener, Ontario. Canada. Part number 628-575 at $ 0.19 each Cdn funds. That's $19 a box of 100. Enough for 50-cars at 2-posts per car. Never say you won't use 100 inserts. I've already gone through several boxes.

https://spaenaur.com/catalog/C199/#zoom=z

I use number 227 Evergreen styrene tubing. The Spaenaur inserts fit into the tubing perfectly with a light tap of a hammer, and won't pull out.

I buy 4-40 screws and washers from Spaenaur too. Once you've bought from Spaenaur. It's hard to buy elsewhere.

Ken