Hello, Could somebody review my attempt to write a layout and tell if it's worth including in contrib? Inventively named ComboP, it mostly acts as CombineTwo, but also takes a predicate which controls new windows placement. For instance withIM (1%7) (ClassName "Tkabber") Grid is roughly imitated by combineTwoP (TwoPane 0.1 (1/7)) (Tall 0 0.1 (1/2)) Grid (ClassName "Tkabber") Also, a few notes/questions from an XMonad newcomer: - I see a lot of flickering when switching workspaces or tabs in Tabbed. Looks like root image is shown first, and then windows paint on top of it. It's very noticeable, especially when some windows are slow to redraw. - ResizableTile doesn't work correctly when placed into some combinator which feeds only a subset of windows to it(?). For instance try this: windowNavigation $ combineTwo (dragPane Vertical 0.1 (1/2)) t t where t= ResizableTall 0 (1/100) (1/2) [] put 4 windows into resulting 2*2 grid and try to send Shring/Expand events to it. Results are unpredictable. - dragPane doesn't work when reflected The idea of layout combinators looks nice, but overall impression is that different combinations haven't been tested thoroughly. Thanks