Reply to "Building a Gr4 replica"

JFB, I'm not sure what box you mean, but yes, in the front, the factory Gr4s had holes stamped in the upper curved crossmember and the lower radiater support for fatique strength (and a little weight savings).

I thought about replicating this, however, since the structures are closed now, holes cannot be pressed/punched to create the edge thickening that is important for strength.

Drilling holes and then bending the hole edge may be possible using heat and a taper tool, maybe? Haven't figured out how.
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