One big failure and one small success.
I had 2 batches running simultaneously that are now complete.
Batch 1. This was a large batch I couldn't seem to get full saccharification in. It was a 5 gallon volume of cooked rice, 30 cups of dry rice. I let it go clear to day 33, and warmed it up. It did progress somewhat, but still had small pieces of hard rice in the mix. I'm really not sure what the issue with the saccharification was. The other issue I had was that of scale. It is really difficult to get enough pressure on a rice mass that large to get a reasonable liquid extraction. I ended up yielding only one 750ml bottle of rice wine from it. At that point I gave up. *sigh* That's pretty much a wasted 8 bucks.
Batch 2. This was a much smaller batch with leftover starch mass instead of rice yeast balls. It came out very well. I did get some mold in the rice, but that isn't that uncommon with these batches. Yield was normal, no issues getting saccharification of the rice. All in all, very pleased with the batch. I do think using the leftover starch mass increased the likelihood of getting mold, but the wine is fine. This also took what the prior batch did in terms of time. 26 days.
In summary, I will not be making batches that large again. It's just to much work. I will also be running successive batches with the leftover rice starch mass. Once a batch with undesirable mold in it occurs, I will start the next batch from yeast balls. That should reduce the need for the rice yeast balls by 1/2 or more. The next experiment will be rice wine vinegar, though I think all I really need for that is some more time with the last batch I've got running.