Everett says:

Anyone know of a stern thruster which could bolt to or through the swim
step?

tongue somewhat in cheek
How 'bout a small outboard? Mount the bracket to the swim platform, pluink the
o/b on before it's required, ready for use. Hire small but capable kid to be
your "remote controls"
tongue out of cheek

Can't think of a better alternative right now. ;-)

Steve
Stephen C. Baker - Yacht Designer
http://members.aol.com/SailDesign/pr...cbweb/home.htm