I went to Harbor freight yesterday and was looking for some small clamps and saw some labeled Hobby clamps . I don't know if anyone else has used them before however I thought I'd give them a try and they work prefectly for holding the gusset blocks in place. On the outside from the gusset I cut a block parallel to the gusset angle put two sided tape on the back and it worked great . If anyone is intreseted the Item number is 43031 I they were three something $ for three 1-1/2" , 3" , 4-1/2". I'm just getting ready to skin the bottom I wished I'd stumbled on these earlier.
JimB KR 2S Wichita Ks