Originally Posted by
sced
Anyway, fashion a piece of ipe to fit inside the hollows, glue it in place with construction adhesive, sink some screws from the outside, reassemble - good as new!
Don’t forget the hundreds of $ in cost for cutting tools that would deal with Ipe!
After that, throw away all the spent cutting tools you won’t be able to use again, don’t wrap it metal, use the ipe as your replacement crank arm, make it an “art fits function” piece.