No, of course I'll use the longtitudinal feed to feed the grinder into the jaws but i need to use the cross-slide to mount it on else it will be too low on the saddle alone and i'll still need the cross-slide to position it offset relative to chuck centre line. The issue is how to position the grinding wheel parallel to the bed. Or are you suggesting it doesnt need to be as long as sufficient of the wheel contacts the jaws while traversing along the bed? I realise you move it in and out of the jaws till no more metal is being removed so maybe the alignment of the grinding wheel is not critical as long as some of the wheel contacts the jaws.