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benana
Biggles567
I saw someone recently on mtbr saying that its best to place dt holes in the upper half of the tube.
Their reasoning was that in general the forces acting on the dt/tt/ht assy are working to pull the ht off the other two. So the underside of the dt is in tension and the upper parts are in compression, as the heat tube levers off the top of the mitre.
They said holes are more likely to fail in tension and so the best bet was to put them in the top of the tube where the stresses are best suited to a hole. IDK how true this is, but it makes sense.
I think its still wise to reinforce it a fair bit as there's alot of stresses up there. And to make sure to not put it in the butt transition zone.