Well, it got here and one thing I did notice as mentioned, the 50mm frame line is not as easy to see with glasses as the others but not as bad as I thought. The lines are definitely thicker and more prominent. I took my glasses off just to see the difference and for those who wear contacts or no need for correction at all the 50 lines are a piece of cake. With the glasses on, not so much but tolerable and not as bad as a 35mm lens frame line on the M2 or M4.
I'll run a test roll thought it tomorrow and see how she does. Just a brief inspection and all seems ok. The shutter speeds seem to sound about right but of course, my hearing is not good enough to tell 1/60 from 1/250th of a second so, I'll run a test at different speeds/aperture combinations to see if there's any discrepancies. I'll still most likely send to off to Youxin for a little CLA just the same.