I recently purchased a Studio 44 on eBay and it is gorgeous but has two issues. They seem interrelated but don't always happen together (could just be two different problems, for example two different escapement problems). The first issue is that about 1/5 times when I return the carriage there is a space-by-space clicking noise (like a finger running across a comb). If I activate the left or right carriage release and wiggle it back and forth, it usually returns to proper functioning (silent carriage return).

The second issue is that sometimes the carriage return doesn't stop the carriage at the proper spot, but one stop short. (so, if I were to not notice and start typing again, I would be starting at space 2). It doesn't hold that first position, although I can press and hold the carriage from the left end and get it to catch there. This does seem to coincide with the clicky carriage noise, but not always. 

As noted, maybe about 4/5 times it functions perfectly--no clicky return and it stops in the proper spot. 

I've posed three videos on my site--one is the problem in action. The second and third are of the underside, as close as I can get to the escapement without removing parts (kinda scared to do that yet and brick a nice typewriter!). I can see (I think) that the end of the dog is not clearing the toothed cog--so, I don't think it is clicking on the saw-toothed blade but rather this toothed cog. Sorry for my terminology ignorance. I've cleaned it quite thoroughly (it was pretty dirty inside, although immaculate outside). 

I did by the service manual and have been reading about how the escapement should function, but it isn't really telling me how to fix it (cuz I barely know what I am reading). 

Any help would be appreciated! I'm hours from the closest repair shop. 

Thanks! 

Here are the videos: https://www.montanawildlives.com/Studio-44