Ok so a few minor updates:

I have decided that since I am employing tension springs to actively work against the motors in a constant tug-of-war while the motors try to grasp, I'm losing grip strength based on that. To make up for that, I'm going to use a separate motor for the distal-most fingertip joint and the second to distal-most fingertip joint rather than have a single motor do both of these joints. I made these adjustments in my CAD. I will have to change the tubing setup for the grasping tubing of the index finger to reflect this change too. This will also give the fingers even more precision and dexterity in the end - not to mention a massive boost in strength - so it's well worth it.

I also decided to use n20 gear motors for the axial rotation of the base of the fingers instead of BLDC motors like everything else since these will only be used when doing the tiniest of micro adjustments and rarely employed - so a little gear noise once in a blue moon for this precision work on a tiny scale should not be that bad. So that's 4 N20 gearmotors going in. These are being used just to save on space taken and pulleys needed a bit. I'm putting these 4 into the forearm in location pictured.

Next, when the spring is pulling, I noticed the TPFE guidance tubing goes from straight and relaxed to wavy under the tension. It is trying to compress under the friction which is what causes this. In the worst cases, Will Cogley's robot hand project had this same issue and the tubing literally compacted so much near the ends that it developed wrinkles/folds where it was crushing the tubing and destroying itself under the pressure. Mine is not to that extreme but this is WHY people put metal coils around the tubing for bike brakes to prevent crushing forces onto the tubing. I don't think I will need this but I might put it in certain places as a last ditch effort if needed later. That said, to prevent some of this compaction stuff on the spring's tubing, I'm going to be using TWO tubes which will divide up these forces causing this by 2. Sharing the load between them evenly. So the tension spring will have two fishing lines coming off of it and two tubes to guide that line to the finger joint where it does it's thing.