g-force said:

The combination of the residual grain being both large and slow-moving is not very appealing. There appears to be some other slight temporal issues that I can't tell are from the original capture, the denoising, or the median/average of the captures.

I think I can release a SD file, with only average/median applied, and without any denoising, @25fps, and another like the former, with the new denoising, @25fps; if the problems come with the first, than probably they are in the original capture (I don't think median and average could cause such issues); if the problems arise in the second, than the denoiser/sharpener is the guilty; if don't appear in both, maybe it's TsMuxeR which did a poor job of converting from 25fps to 23.976fps.

The audio looses sync slightly over the duration of the movie.

Could you please be more precise? I presume you are talking about the english track; I just checked few minutes at the end, and it seems the audio is in sync with the video... Don't know, the audio tracks were left into the original captures, and the same cuts were done both for audio and video, so they MUST (theoretically) stay in sync... again, maybe TsMuxeR messed up all, or I did something wrong during the conversion from 25fps to 23.976fps! You'll may check one of the file I'll release, cited in the previous answer.

Any chance you could upload the best of the raw captures before combining them and post-processing? Might allow better feedback as to how to improve your final product.

May the two files I'm talking about in the first answer be enough? As I'm really, really sure the four captures are aligned with a pixel perfection...

If you think this is my first attempt at restoring a movie, and it took a month (about 150/200 working hours) to do it, I'm proud of the work I've done!

And, G., "this isn't too bad" to me means "quite good"! Thanks!