I think you need to recalculate, 1000 feet in 1+ minutes = 1000fpm. Thanks for such a well documented report, and congratulations.
Ron Freiberger mail to rfreiberger at swfla.rr.com <- substitute an @ sign ;o) Climb measured with stop watch from 2000' to 3000' was 1 min 4 sec, so she is now consistently delivering 500 fpm from Sea level.