Cleaned, fluxed, and ready to silver braze. On my ride into work, I determined that I needed to remove 10mm more from the bottom bracket end of the seat tube. This will allow a full 100mm contact area for the Thomson seat post. I'm sure their minimum insertion requirements have a safety allowance built in, but the full 100mm is now available.

All brazed with 100% penetration. After the frame is complete through the braze process, I will go around with low heat and a stainless wire brush and remove any errant silver braze.

Into my high tech hot water soak to remove the flux. Next will be checking and aligning as necessary of the seat tube to the bottom bracket drive side face.