I've had very good luck focusing my 135/f4,5 Hektor. The most trouble I had was framing. I used it with a Leitz VIOOH and TEWE multifinders at first. I found that the parallax compensation was good on the VIOOH but the 135mm setting cropped too much and I had to adjust for it. The frame was also very small. I got a TEWE 35-200mm finder, which I found better for framing since it magnifies the image but its parallax compensation was difficult to dial in. I find the mechanisms for setting parallax a clumsy on both finders but the TEWE is harder to set accurately. I ended up buying a dedicated Leitz SHOOC 135 finder that works great and gives a very bright image. Frame lines are more accurate than the multifinders and the parallax compensation is easier and quicker to set by turning a ring around the finder. On the multifinders, the whole vf would move up and down but on the SHOOC, just the framelines move.
If you get a T for the 135mm, don't waste your time with multifinders like me. I'm glad that you already have the SHOOC finder. Still you have to remember to compensate for parallax. I still sometimes forget.
I'm not sure how you would take to the rf in the T. It's pretty squinty. I don't uses glasses but most glass-wearers that tried out my camera didn't like it too much. With the 1.5x magnification, I find that the rf more or less approximates the view of a 200mm lens than a 135mm.
The Bessa-T is a great little camera and I found it to be an ideal companion for my 0.72x MP. Great value for the money too.