When I put a picture frame together with 4 mitered corners I use a clamping fixture with 4 v-blocks and a draw bolt in the center. But when I put hardwood trim on the outer edges of a top it is always a challenge getting them all to stay together to clamp up properly. I cannot use the frame fixture because there is no space in the center. I used to air nail the pieces on but then that left holes to fill.
So I tried this and it worked pretty good so I thought I’d share it with everyone.
I make sure the center part is square and put it face down on the bench and then cut all the trim pieces to fit precisely without gaps.
Then I glue the perimeter of the center piece and the mitered surfaces of the edge trim. I place the pieces against center section and put one clamp to keep them from moving while I contain all the trim with a double bungee cord.
I let it sit for a bit and then flip it over so I can see how flush the trim is to the surface and add clamps in all the critical areas until the glue is dry.
After is is dry, I just sand the top to make sure the center and trims are flush before finish routing the edges.
There are probably a lot of ways to do this but I found this saved me a lot of grief over the old way I used to do it. The bulk bungee cord I bought at a flea market for another project and it really worked out good because it maintained pressure on all 4 corners. I usually dry fit it with the bungee cord on it to make sure the miters are all correct. They are a lot easier to recut without glue on them!!
-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!