I am moving along on my harp ukulele; I put in the end wedge today and have the top glued down. I know the end wedge is backwards
? ; I am sure the reverse direction will improve the tone. Gluing down the top was interesting. Usually I use a mold to hold the shape when I glue the first plate down. I decided not use the mold because my mold is thicker than the harp peg head block. What I did instead was, while properly aligned in the mold, mark all of the braces on the kerfling and used a pencil in key places to mark where the body was supposed to end up. When the kerfling rebates were routed and the brace ends trimmed properly, I was able to re-align the body without a mold using a combination of the braces in the rebates and my alignment marks. I just used nearly every clamp in my shop to hold the top down. I did end up with even squeeze out all around. 
