If you can't chain piece, you could try this.
Lay your block out on a piece of foam board (Dollar Tree and Walmart have them for around $1) cut it 14" square.
Lay out your block pieces on the board. Pick up two, sew them, put them back in place, pick up two more sew, repeat until all your pairs are sewn. Pick up the board and take it to your iron, press them all and replace them on the board. Now sew the pairs together the same way, and take them to the iron... You can stay organized, and not be constantly jumping up and down :wink:
You can set up many boards this way, just stack them up, and then you are getting up and down even less, BUT often enough to stretch some muscles :wink: