Janel, Doug, and Robert
Thank you all for your comments and suggestions.
While grinding away I did have a large mug of water (a bucket seemed overkill for a tool 1/8" wide ) next to me and tried to dip the tip as often as possible. This had two positive effects: It cooled the tip down and it slowed me down so I would look at the results of the grinding more often. That minimised the errors made. Though haste did get the best of me on a couple of occasions and it resulted in the pretty colours seen in the pics .
As far as handles are concerned, I tried a few shapes (VERY short and stubby, graver-style handle, and long slender) and I seem to favour the really small ones, at least for the first shape (oval). I seem to remember a pic in Janel's site that showed a few tools with very small handles. For my hands, at least, it afforded both control and comfort. Future experience will probably solve this conundrum.
As for the particular shapes, I am so far pretty happy with them. As a first toolkit it seems pretty versatile. The main reason for wanting a motorised way of making tools (hence the jerry-rigging) is that I would like to be able to make more tools as the need arises, in a manner that does not remove me from the actual carving for too long. Currently, the rough shaping on the grinder takes a couple of minutes, plus about 20-30 min on the rough and fine waterstones. In theory I could have a new tool in an hour when I need it. I also realise that learning to carve also involves learning the characteristics of the tools used, be them gravers, scrapers, chisels, drills, acids, sandpapers, files, paints, inks, hammers and generally ANYthing that gets the job done (care to add to the list? ). In those lines, I thought of the square-shaped tools AFTER I had already ordered the round ones. I figured those can wait for another weekend of grinding. One can only spend so much time away from the actual carving. I do like the idea of the lozenge and square gravers though.
So, what's next you ask Janel? More learning I suppose
I will put those tools on some wood or bone and get used to them. Make a few mistakes, get to know the way they like or dislike handle shapes, plan some more shapes, have a glass of wine. Every day is fresh in its own way. I'll keep you posted