I just got 60 fps in Win10 running in Glide with nGlide.
We imported Glide3 thanks to Zeus a few years ago, but one essential is the eaw.ini being set to the default 1024x768.

My nGlide configuration setting has the size set to 1920x1080 which is my monitor default. This maintains the round gunsight, but gives the black panels either side of the screen. The on-screen appearance is much better than the screenie, but you can make out the 60 fps