The “splices” are just the physical glue marks that were used to edit the negative together. They’re just visible in the HDTV transfer because of how much picture information was saved. There is nothing unusual about them and erasure is not a good idea (The Blu-Ray does this anyway).

Also, any restoration of Monster Zero using a Japanese source is a fool’s errand because all Japanese film sources of the uncut version are inherently INFERIOR to the domestic U.S. elements (which are in desperate need of a re-scan a la the Classic Media Gargantuas).

The uncut camera negative of Monster Zero doesn’t exist anymore. The uncut version Toho uses for video is a foreign element several generations removed from the OCN and it has stabilization and fading problems.

Using the Classic Media reconstruction of Ghidrah is a fool’s errand as well (I realize you acknowledge the sync errors, but there are unnoticeable visual ones as well). It’s not very accurate and pretty clumsy at times. If you want to carefully re-create Ghidrah, use an original 16mm source like I did for my SD reconstructions. Also, the best (incomplete) source for the audio is the 16mm print on the Australian Siren Entertainment DVD since it’s not an old 1 inch tape master.

Ghidrah also has a shot that’s longer than in any existing Japanese source (a shot of Infant Island when the Shobijin summon Mothra).

The end title you did is pretty good (nice work removing the “Owari”), but it’s not accurate. The 8mm Ken Films 'scope version of Ghidrah shows that the end title is supposed to be stretched to widescreen:
https://s30.postimg.org/gnizs8k4x/vlcsnap_2016_12_17_09h02m32s183.png

I made that mistake myself when I did my reconstruction. I’ve since corrected it:
https://s29.postimg.org/qrvkj7vc7/vlcsnap_2016_12_17_09h05m34s217.png

BoxMonster and I collaborated on a version of the opening credits in 720p with fake gate weave and grain for the freeze frames and a font that’s very similar to the original. I still have the .mov he sent me.