I'm crocheting lapghans. I'm almost done crocheting my 4th one from the same pattern. The pattern says 41 rows which goes over your legs to just over the knees. I need to put the edging on them yet but I'm thinking about crocheting up to 50 rows. Do you think it would be better to have 50 rows for a lapghan? Also, I'm thinking of putting ties on the lapghan like someone else said they did but where would you put the ties - in the middle of the sides? These lapghans are Wheelchair Lapghans.