About two years ago, I bought two Gramercy dovetails saw kits. One went to Tom and today I have spent the whole morning making the handle for the remaining one.
Once I thought I had it ready I checked the straighteness of the blade and I found that it appeared to be bent. Double cheching showed that it was the handle that was badly made. The saw cut for the blade and the recess for the spline didn't match and that made the blade bend when inserted on the handle and the nuts were thightened.
The blade is so thin that any slight deviation forces it.
After trying to fix it in several ways, I finally decided that I will start anew some other day, and this time I will triple check before going through al the shaping and sanding. I believe that not having a 11/64 bit to make the groove and having used the closest metric one may have helped, but I made the previous one in the same way.
I include the pics so that anyother may learn from my mistake
Tom, do check yours, as it may have the same problem and I may have not noticed it when I made it ( although I think I checked it before sending it to you.