Sometime ago someone on this forum told about a disappearing 16 patch using any size squares to start with. Maybe you could sew 4 of your 4 patches together and follow those instructions-very easy I tried it with some scraps just to see how it would look and really liked it. Basically all you do it cut your 16 patch on the diagonal like an X, seperate them,rotate and sew 2 back together ,repeat and you end up with 2 nice squares that look like they are on point. You can sew these together and keep going or put sashing between .Hope this helps.