On Wednesday, Kat and I returned to The Flatiron so I could finish the rebolting work there.
I climbed a new version of the Regular Route (same one I did the day before) and went to work on Burtons Below.
When I climbed Burtons, I noticed that bolts 4 and 5 had SMC death hangers and bolt 6 had a Leeper hanger.
Bolts 5 and 6 are really close together and have a nice stance below them - so I worked on those first. someone had left screwlinks on both bolts.
I removed and inspected bolt 5 (a short 5 pc carbon steel bolt) and then put a shiny stainless SMC hanger on it (one I retrieved from Lost Fortune's first bolt the day before).
Old death hanger on bolt 5 with a heavy schmear of silicone

bolt 5's internal bolt with the "new" hanger

bolt 5 after a little surfacing to make it flush with the shiny "new" stainless SMC hanger

I then proceeded to remove what I initially thought was a split shaft (bolt 6). It turned out to be a 3 3/4 inch wedge bolt and only half the clip came out with the bolt shaft. I was surprised that it even came out. I wouldn't normally use my puller tool on a wedge bolt for fear of breaking the tool.
Old bolt 6 with the hanger removed. Note threads continue into the hole meaning this could be a long split shaft or several other types of bolt (wedge? set bolt? damnit!). The letter stamped on the end was a tip-off. I haven't ever seen that mark on a split shaft (normally blank). The rule is go easy when turning the wrench on the puller tool.
In case you're curious about the puller tool.
Large washer and coupler nut go on first

Then the puller tool is screwed into place

Tighten down the big nut on the puller shaft which draws it up the square tube and pulls the bolt out

the old bolt

and the replacement bolt installed and torqued

When I led Burtons I nearly missed the 4th bolt because it had a bunch of silicone smeared on it, was a somewhat patina'ed SMC death hanger and had been spray painted after it was installed with brick red primer (not a criticism - merely an observation).
It is also quite a bit left of what I perceived as the natural line - so I wasn't looking in the right place
Check this out - where the heck is it? (nearly invisible from any distance)

closeup

and the new, shiny carbon steel Fixe hanger after a little surfacing (very visible now)

That was it for Burtons. With Brad's previous work - it is in primo shape now.
I switched over to Lost Fortune and replaced the remaining two lead bolts on that. Both old bolts were split shafts that needed a lot of surfacing after I extracted the old bolts and drilled the original holes deeper. The top/3rd bolt came out easily but the second bolt was unusually hard to extract. They are all in fine shape now. The only climb on Flatiron that has not been rebolted is Silent Running. It is 4 star dryvins with SMC stainless hangers. The other two existing routes (Angle Iron and Mungy Bulgy) both have modern hardware.