Today my Dremel multi tool has arrived :D
I have had a small play with it on a few small stones, but I need to get some more diamond drill bits to engrave as only 2 came with it.
It's certainly not as easy as I thought it was going to be and my lines are quite bumpy, not sure if its the stones or an unsteady hand or combination of both.
But I am not going to be beaten by it as I have some ideas that I need it to work for! Watch this space.
UPDATE 8th march
I ordered the flexi drive shaft for it so that I have more control. I Ordered it on next day delivery and it has arrived. Had a play and I can do much neater finer lines. Now to get some more rocks and get on with what I hope to do.