I use Nendo too Ian but just got XL V6 which has hypernurbs which are very like nendo but smoother so I'm in heaven, I guess down the road GO will be updated to not sure which parts of Xl it'll get though.......I get that with the thin strap too but it doesn't seem to affect the clothes (wierd though) for sleeves try booleaning the holes then go to side view and create a spline on the edges of the hole (just one side) try to get it as close as possible then start lofting from that, then mirror the extrude you used for the boolean and boolean the other side then mirror a copy of your sleeve and if your lucky it'll fit the other side, if not just mirror the splines instead and adjust the first one to fit the gap...now if you have a bad join do a pipe (um whats it called again :o) you know where you create a pipe along the spline.to act like a seam ....Steve