I’m still waiting on the 4.11 houdini engine but a small update.
There’s a Blender-Houdini (and Modo) exchanger that allows you to easily export and import meshes between the applications. It can be found here: Exchangers · mifth/mifthtools Wiki · GitHub
I made a small edit to the shelf tool code, on line 31 I changed the line to “node = hou.hscript(“fbximport -u geo %s” % ex_path)”, that way the geometry nodes are unlocked so you can then make your edits in Blender, click export, then in Houdini click Reload geometry to reload the new mesh.