BUT this brings another thought to mind - maybe one of your wheel
bearings is sloppy or perhaps something has entered the bearing and
intermittently gets pulled into the rotating action - causing the wheel
to jump.

ok I checked the bearings atleast in the top wheel. don't know why I did not
check the bottom (G) but they seemed nice and smooth. the rubber looks good and
still has the same crown it always has.
nothing gets pulled in just sawdust.

--
Knight-Toolworks & Custom Planes
Custom made wooden planes at reasonable prices
See http://www.knight-toolworks.com For prices and ordering instructions.