4th Block done. We had the same problem with Block 3 where it has come up smaller than it should and needed a border (there was not going to be any unpicking on this!). After checking everything it turns out that our seams are too large (thought we were using a 1/4” foot) which was fine in the first 2 blocks where there weren’t many seams but crucial in the last 2 which had a whole heap more seams! Anyway, have now trialled and worked out which foot is best and where seam should be so shouldn’t happen again. Block attached.