The only FWS I did was the first group one done here (2010+). I didn't have problems with those 6" blocks, nor do I recall any of the others that were doing it at the same time having problems. Of the FWS quilts, the first one is really the only one I like the look of and was never tempted to do any of the others. You can do a pretty thorough research of all of the FWS quilts and blocks here, which should help you decide which, if any, that you want to do.