You did an amazing job of getting in there and getting it done. My projects take longer, but I do enjoy the design. This gearmotor doesn't need quite the current of your DD motor so I'm not trying to fit 5P in which should make it easier. 14S will be a nice speed bump over 12S, and more of my ebikes are 14S than anything else, so it is becoming a "standard" around here.
Thanks for the 18.2mm diameter data. I put 18.4 in the design but this latest printed part only has room for 17.45 so I'm going to have to adjust things for this new Slicer. The old slicer was closer to correct size but made some errors on the print. This new part does look better in many respects, now that it is using the right print settings. Looks like it forced two perimeters even though there isn't room for more than one. No wonder it is thick. I'll have to study the adjustments. This was printed without any changes to the new slicer default settings, need to start somewhere.
I will get some photos of the battery process, and I have a few other 18650 packs so I've seen the performance drop you are talking about. The big Lipo packs are amazing.
This is more of a feasibility study to see if there is an easy to build design, I don't have cells yet. Before making that investment I want to be sure it isn't a difficult fit. This may also help others to follow a similar path.
So I found the slicer setting for perimeters, it was at 2, it must have overridden the fact that there was only wall thickness for a single perimeter. Printing again.
I have a stack of trial 3D prints from the new slicer, but it is starting to look better and better. One of the values of the printer I have is a large set of pre-tuned filament configurations for it's free slicer, the new slicer came with few and some of the default values were wrong, like the filament diameter was slightly off and the hot end temperature was a bit low, and there were several settings that were preventing printing thin perimeters. I generally don't print such thin parts so I hadn't run into the issues with the standard slicer. It was making parts thin enough but there were other defects.