i obtained one from a local dentist. he was relocating and gave it to me in the original crate. it's a superb machine. so quiet, i sometimes forget and leave it running. yours is a good buy if it looks to be well cared for.
welcome. all are (understandably) quite eager to start asap. this can lead you to spend money that may better serve you by investigating much and spend slowly. the first tool to consider buying:;- a good set of mechanical pencils. all too often newbies buy all the toys with no thought of...
the critical factor is the degree to which the final polish is taken to. whatever the tooll is made of, well, i have never seen a difference in the work i have done.
if the tool is made properly it should take an eon or two before it goes dull. i have made them using hss and carbide. used dental burs are good to get into tiny areas. btw-- some of what i see is punch dot, not stippling.
by all means-- learn the basics using copper. as mentioned, push graving is for light, delicate, and shallow work. for more bold work, hammer and chisel would go well in your bag of tricks. i might ask, how are your drawing skills? good drawing and design concepts are the foundation of all good...
the .5 objective lens is important. it cuts the optical power in half, but ( importantly) doubles the working distance for your hands to get in and do the work. even at half power, the useable power is sufficient for almost any engraving situation you'll likely encounter. if needed, one can buy...
your work has been exquisite over the years. this is no exception, as it is quite lovely to the eye. i'm curious, arnaud, how you managed to solder fittings onto the buckle back ?
i used a pneumatic chisel "driver" quite similar to the one you used in your video. all manner of points, bush tips, and a few i made myself. i never trained myself to achieve your level of competency. sadly just did a lot of quick dollar commercial stuff. you're quite correct about the flow of...
just m2cw: take yer time. engraving is a lifetime adventure. start scouting the bay for used bino stereo zoomers. in maybe a month, maybe less, you'll likely find a "keeper". i started with a less expensive chinese scope. it was fair. i later scored a really nice leica for an excellent price.
i think i see a very minor flat spot. once engraved, it will not show. an excellent start. good drawing is the foundation of all you will do, and can't be emphasized too much. good luck to you.