The adjustable mouth on the LN 60-1/2 helps around tight curves. A wide open mouth lets more of the edge being worked into contact with the blade.
LVs Apron plane does have lateral adjustment. My fingers or a small hammer to tap the blade seems to work well for many folks.
LN also makes #102 and #103 planes that are similar to the LVs Apron plane. Not sure if either has a lateral adjuster. One is low angle and the other is high angle.
jtk
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