I could use some help dialing in the fit of my MTM shirt. It's pretty close, but there are two issues:
- There are some lines running from the shoulders to the center of the chest ("V"). It's not too bad, but it indicates something is too tight
- I have fabric bunching a bit under my armpits

I'm not looking for a skin tight fit, but this is the problem I have with most OTR shirts, and I was hoping to correct this by going MTM

I think I have the correct shoulder width, so (1) may be caused by my shoulder slope. I think I can also slightly reduce the chest size to address (2), but I'm worried it might exacerbate problem (1). Thoughts?