This English built frame has two to three drilled holes in each of the bottom bracket shell ports and two in each side of the bottom head tube lugs. Look closely at the photo showing the bottom bracket shell; just to the rear of the rear cable guide you will find drilled holes. Look closely at the photo of the head tube; you will find drilled holes in the bottom of the lug. Is their purpose to minimize condensation in the tubes? BTW, the drilled holes don't go through the tubes. The drilled holes in the drop outs are for lightening I'm sure. The holes that I am speaking of are not to vent gasses, those holes are already there.