four pieces of soft foam and some baling wire to make a ring out of and twist on with a pair of pliers. I've done it before in a pinch w no problem. Just something to keep the dirt and elements out...might run a hair lean.

I think I saw another thread where you were concerned about pods. I run 'em happily w no problems.

http://chopperbuild.wordpress.com/

RUNS FINE BUT BEAR IN MIND SHE AINT NO WHIZZY DYSONESQUE FUEL INJECTED COMPUTER CONTROLLED VIDEO GAME ON WHEELS SHE CAME FROM AN AGE OF REAL MEN WITH BALLS AND HAIRY CHEST'S N STUFF WHEN LAGER DRINKERS WERE OLD ENOUGH TO GET INTO PUBS N NOT HANG AROUND SHOPS ALL NIGHT SCARING OLD LADIES