I own a ro90 and pro 5 ltd and both came with edge guards. The ro90 edge guard sands right up to the 90 degree corner and the pro 5 can only sand to about 1/4" from the corner and I have to hand sand or use the ro90 to finish. The pro 5 is more like the window guard kit I purchased for my ro90. I am considering buying the new DTS 400 REQ with edge guard to go with my older RTS 400 that does not have the edge guard. Does the edge guard for the new DTS 400 sand right up to the edge like the ro90 or does it sand more like the Pro5 leaving a 1\4" unsanded.