My first quilt machine did not have a stitch regulator so I bought one for it. Night to day difference. So when I upgraded, a stitch regulater was a must.
As for frames, I know this much, they have a weight limit. You might need to get the weight of the machine and see if your Grace frame will hold that much weight. The carraige also has to be long enough to hold that long arm in a balanced manner. If the carraige is too short, you will have problems because all the weight of these machines is at the back. If all of this checks out, you will not regret getting the longarm.
Always in a Texas state of mind.