The drill is screaming!
I had a De Rosa King frame in for service from a customer,
↑(signature: Ugo De Rosa)
This frame originally only had bottle cage holes on the down tube,
but someone had added threaded holes to the seat tube afterward.
When a frame has only a single bottle cage hole,
it's usually because the frame size is small,
but this frame isn't small enough that dual bottle cages would be cramped.
The customer's acquaintance, who owned this frame previously,
had added extra bottle cage holes,
but they just drilled directly into the frame and cut M5 threads—
a pretty sketchy approach.
↑upper hole
↑lower hole
Plus, the holes weren't aligned vertically.
The upper hole was off to the left, and the lower hole was roughly centered,
so when drilling the pilot holes for the rivet nuts, I enlarged them
to line up the top and bottom holes better.
Expanded them.
Installed the rivet nuts.
I had a De Rosa King frame in for service from a customer,
↑(signature: Ugo De Rosa)
This frame originally only had bottle cage holes on the down tube,
but someone had added threaded holes to the seat tube afterward.
When a frame has only a single bottle cage hole,
it's usually because the frame size is small,
but this frame isn't small enough that dual bottle cages would be cramped.
The customer's acquaintance, who owned this frame previously,
had added extra bottle cage holes,
but they just drilled directly into the frame and cut M5 threads—
a pretty sketchy approach.
↑upper hole
↑lower hole
Plus, the holes weren't aligned vertically.
The upper hole was off to the left, and the lower hole was roughly centered,
so when drilling the pilot holes for the rivet nuts, I enlarged them
to line up the top and bottom holes better.
Expanded them.
Installed the rivet nuts.