Ooh!Can of worms.Oil stones,I use a combination system,Ezelap full plate diamond,which is then used to flatten oil stone,finishing with arkansaw,again flattening after with ezelap.The trick with oilstones is,to flatten everytime u use them,little and often.Of the 6 oilstones i use all are either flattend with diamond or against each othr.This is a pain,but I find,different stones,different edges.Trend do a sharpening jig that look's good but I've never used it.On the subject,axminster machine tools,or ruttlands are both online and have an exelent selections of jig's.You may want to give thought to switching to japanese water stones,I've a selection of these and u would not believe how easy to use.plus,lubed with water,extra plus,availiable in grits down to 60,this brick i have used to true both oil and waterstones,jawdropping/
caine, July 2008