when you got some good ones at least you can sharpen them
all you need is a bench grinder and a bit of knack
made a few nice spechal drills out of old quality drills like grinding an old one into a spotweld drill works wounders
know what your on about bonzo but you do have to watch the flute pitch and length when using them on steel or in a lathe thay have a habit of braking if your not careful