Lady Machanika gets an OHC
Sadly it only collects the first full mini series, Mystery of the Mechanical Corpse, and the #0 one shot titled The Demon of Satan's Alley. Six issues total for the volume.
I have been buying the singles and held off on the trades wanting to get a proper multi-series collection into hardcover. That apparently is not in the cards. I just don't know if this is for me.
I totally feel that any OHC collecting a series should at minimum collect 2 of the mini-series or be at least 10-14 issues in length.