RK,
Hope they do help. Are you installing the draft arms on the tractor's link pins 1st (i.e. both draft arms closest to center) then the attached spacer (with turnbuckle) then the short spacer? I'm not sure that it would appreciably change the distance from the link pins to the mower, all that much but, when I look at my manual it is some times hard to tell from the pictures which component is supposed to go on first. Draft arms on first is the best fit, for me. Putting them in the position that would make them the closest together at the link pins on the tractor appears to be where the draft arms belong.
As for leaving the 3PH parts on the attachment, I've found that the "I-Match" makes for convenient storage for the 3PH. Hanging it off the RB, in the pic, is a matter of convenience and keeps the parts up off the ground (still no barn /forums/images/graemlins/frown.gif). As for attaching, with the parts connected to the I-Match, it is pretty easy to line up and attach to the tractor. It still takes a bit of muscle power to move parts around and, I've been known to take a wooden or plastic head mallet to "persuade" parts to get to where they belong. I usually back up, slide one link pin in to attach a lower draft arm, lift arms, and top link, then, as needed, release the I-Match from the RB to attach the 2nd draft arm (this is where the mallet occasionally comes in /forums/images/graemlins/tongue.gif ). Seems to work for me. I used to take it all apart and hang the pieces in the shed before realizing I was wasting a lot of time when I could just leave it all hanging on the I-Match and RB, or Mower, or,...and only have to adjust the toplink for which ever 3PH implement I was going to use.
Let me know how it works out. Seems as though you must have some thing in the wrong place if your dimensions match mine.
Tom