There was a thread where one of the members cut the topmost tube and flipped it, welding it in place where a boy's bike would have it. It came out looking real
nice, the counter curves blending in well with the rest of the frame. I have no
idea who did that or where the thread is, sorry - if I spot it I'll link ya.
Good plan on the mountain bike build, I almost destroyed mine with my ham-handed first build technique - lol, some things are so simple and yet...