Im towing Gliders this fall for some side work to fill in holes around instucting and scenic flights. The best part is I get to go on some glider flights now and then. More fun than any other flying I have ever done. I have decided that despite the time not being as great a logbook filler (in terms of working for an airline) Im still going to get my commercial glider add-on this winter. It is too much fun and I can already see that it will greatly improve my flying... I still get to build high performance airplane time when I tow.