Ask a question about T12 soldering iron tip?

I have been using a Japanese white light FX-950 welding table, but the white-light T12 tip on the market is difficult to buy BC3 horseshoe head and C4 horseshoe. I only bought the BC2 horseshoe head. Recently, I saw Shenzhen Baiguang (it has nothing to do with Japan Baiguang, the brand is Bakon) has these two models of the T12 tip. Have you ever used the brothers of Shenzhen Baiguang T12 tip? Inconsistent)