Mr67Stang - I did it a darn good job making the block solid to ensure the wing doesn't fly off (with traingle stock and fibreglass cloth. No worries, the rest of the plane is built fairly light!) so the blocks aren't coming off unless I cut a whole section off the fuselage . With regards to the installation of the dowells, I had the same question and I have to admit, I had to read psguru's posting a few times to fully understand what he is proposing. If I got it right, what he is suggesting is to line up the dowel first (taper and everything), and then make the holes in the wing to put them in. I don't see any other way than making a holes just a bit larger in the wing to allow some movement of the dowel after inesertion, and then filling the gaps with epoxy or Gorilla Glue when everything is mounted.

Inewqban - Thanks. My dowels are perfectly fine, the problem is the holding blocks. What Airfieldmodel explains is the correct procedre, but I have already messed up the holes so it's a little too late. My original holes were perfectly aligned, but when I enlarged the holes in the holding blocks to put in the inserts I messed things up. I think the issue is that I went from a #7 drill to a much larger size at once and that messed things up - lesson learned (I think next time I'll just harden and tap the hard wood instead of putting in the inserts. I was listening to advice from someone in our field, but it seems most poeple don't bother with inserts and they don't have any problems.)