Bruised Boutique, and got me EXACTLY what I wanted. I now have Riedell 965 boots mounted on XK4 DA45 plates (short/forward mount). I can't even begin to say how touched and grateful I am that they did that.
After skating on a slightly larger plate mounted all the way back on my skate for so long, I felt like I was re-learning some basic skating habits last night. At least once it became apparent that my "hanging out and listening between drills" body posture will have to change - I kept tipping backwards and fell on my bum at least once. Thank goodness I remembered my butt pads this time.
The plates are nicely maneuverable and snappy. I'm sure the shorter plate helps, and man, these 45 degree trucks are excellent. I always loosened my trucks as far as they would go before the wheels hit the boot, and even fully tightened these are looser than my old ones. I'll probably experiment with softer cushions to see how far I can push this, because I love wiggly skates.
I'm pleasantly surprised at how easy these are on my feet given their newness. I hope this comfort lasts - I'm always suspicious of insta-comfort boots and their long-term fit. However, my friends who wear these boots have all said that they don't stretch like crazy, and the padding inside doesn't smoosh and flatten out, leaving too much space. Fingers crossed.