Morning all, have just taken delivery of a new Perform CCWSG Whetstone Grinder , its a replacement for the previous one which was damaged in transit. However this one has also been damaged in transit. Now while I can live with the damage this time (one of the cast feet with the bolt hole in has broken away) there is also another problem. I fired up both of the grinders to look for other damage and discovered that the whetstone wheel on the first oscillated quite badly, I presumed that this was the result of whatever bump had caused the other damage but the replacement grinder suffers the same problem. I was told by APTC customer services when I contacted them about the first grinder that it was a cheap model and basically you get what you pay for (re the oscillating wheel), a very helpful chap in their tech dept then told me that while they were cheaper models they were still fit for purpose or they wouldn't be selling them. Anyway he despatched a new one to me and dropped a diamond dressing block in the box as well. Question is , should the whetstone wobble noticeably? or run true on its axis. Does that wobble mean, as I suspect, that one could never use it to get a straight edge across a chisel or plane blade without major attention with the diamond block to essentially reshape the stone so that the oscillation around the spindle / axis doesn't translate to the abrasive surface of the stone? THanks for any advice you can offer, I guess Ill have to ring them again at some point this afternoon if its going to go back least I can badger them about not having got a catalogue yet.