Nice progress shots. Thanks for posting, it's nice to see other's builds.
It looks like you oriented your handle so the point in the 'tear drop' is pointing straight back? I wasn't sure what the intended position was, but what felt good to me was to mount it sideways, so the pointy end points to around 2 o'clock (upper right). This gives it more of a T profile like the new handle.
I mounted two buttons on the handle base rather than the handle itself. At least with the current size of the handle that put them in a nice position to reach with my thumb.