I use a grinder I bought in Aldi 10 yrs ago for a tenner,I`ve been sharpening tools all my life so a quick swipe does the job,I bought a cheap water wheel from Axminster last year,just to se if they work any better,you do get a finer edge with them,but it takes longer,and you have to remember to keep the water topped up,I bought all the jigs,the cheap versions,but never use them,by the time you have the tool in the jig,you could have sharpened it and be back on the lathe turning,in my personal opinion Tormecks CBNwhels,Diamond wheels,and the like are far to over priced for what they actually are,cheers,
Eric.