(I do this with the iddybiddy little spacers in SJ's so I know it works pretty good.)
It's easy to overthink it.
Work on the level.
Hold the barrel horizontal, put the eraser in on the lip of it the way you want it and use a pusher stick (see Race-trac coffee stirrer or 1/3 (width wise) of a pop-sicle stick) to push it in carefully and slowly to the bottom of the barrel. Once there, *keep the barrel horizontal* to keep it in place. Put the j-bar back in with the barrel horizontal until the bar goes up against the spacer and holds it. Prestomongo.
Bruce in Ocala, FL
Edited by OcalaFlGuy, 18 September 2009 - 00:37.