Cliffy you said in an earlier thread "When the miter gauge from my SS is inserted in the MiterSet slot there is a small amount of sideway play that will show up in segmented cuttings for bowls. Enough movement so perfect angles can't be set against a hard stop".
If your miter bar does not fit snugly in the MiterSet quit trying to make it work. To do so is futile. Resolve the issue with either MiterSet or with the miter bar.
I have to say that it sounds as though you are using a standard MiterSet and not one made for use with a Shopsmith miter bar. I say this even though it has been stated that you have a "Shopsmith MiterSet".
Consider using a feeler gauge with the miter bar and MiterSet to determine just how much slop there is. Quantify this issue, please.
While we wait for pictures, could you do this without using the MiterSet. Use the miter gauge and whatever you would use to set it at 45 degrees.
The final fit (45.3) should be perfect and measure 90 degrees (both inside and outside). If it doesn't, the MiterSet won't help at all.
Now flip both pieces over and recheck joint for mismatch. Hopefully there are none on either side.
