Now let's turn our attention to the other end of the pipe. Flatten it preliminarily and check the width. Is it the correct size or slightly larger?



If yes, lucky you; proceed to the next step.



If no, try this: flatten the end some more to get it as wide as possible. Any luck? Me neither, it's still not wide enough. Don't worry though, I've got a fix for you.



Open up the end of the pipe again with the help of a hammer, vice, and flat screwdriver. Get the end back to a roughly round shape and try to smooth out the kinked edges.



And now, the real magic: we are going to make the pipe wider.



-Make a cut down one side of the pipe about 1 inch (3 cm) long (see picture).

-Widen the cut. A cold chisel worked for me but your flat screwdriver could work here instead.

-Keep the cut splayed wide apart whilst flattening the pipe again. This is tricky because the cut gap will want to close up. I kept flat a screwdriver lodged in the cut whilst clamping the pipe flat again.



Is it the flattened pipe the right size now? Great!



