I bought a (used) Speed Box II before I even checked if I could use it on my RM-4. Apparently it's old enough that the leads to the turntable are hard wired, which will make injecting the Speed Box into the mix more interesting.
Has anyone experimented with adding enough jacks to cuts in the power cable so a SB could be hooked up? Or soldered the leads directly? Is there some other reason besides the connections Pro-Ject provides why this would not work on my turntable (resistance/voltage/etc.)? I plan to use these items till I drop or win the lottery, so I'm not much persuaded by preserving resale value -- though if it's smarter to sell on the SB I would make out much better by not cutting any connections off it.