I used a one-man rigger with my ASW-20 for several years and had no
major problems. The easiest way I found to align the holes was to use
the fuselage ramp height adjustment after getting the wings
approximately aligned. Not many iterations. I now use a one-man
system (WingRigger) with my Discus 2 and find I need to have better
alignment for the one-pin system since the spar pins need to engage
with each opposite wing. I sometimes need a helper to wiggle the
final adjustment with the Discus, but rarely needed to do this with
the ASW-20. You shouldn't have any problems with the ASW-15 - just get
a nice unit with big wheels. I recommend the WingRigger built here in
Arizona by Steve Koerner.

Mike