i used an amscope for sometime. i ended up getting a leica.. the amscope. worked nicely but for optical quality, fell way short of the qualiy of the leica. nobody likes to spend the xtra noney, but---------
guns arent good for practice. you should perfect your cutting and design skills first. there's plenty of round and odd shaped items to practice on first. baby steps jmho
like td-- i have no use for knife gravers. just a personal choice. the knife graver must surely be sharpened. if the point gets a bit rounded, it wont cut but will skip all over. if the point breaks, it will dig in. either way leads to using bad language !!
mtlctr got it right. if one has the will the skill will come about. all the ngravers of old had no system other than what they cobbled up at their bench.
the rule:: the graver of choice must produce a cut of proper depth/width and the result should be good to look at. the other rule requires one to adhere to the principle of quality design that suits the job at hand. no caliper or micrometer work here, just yer experience thru lots of practice.
check the tip section on the forum. also check youtube for videos. for a newbie sharpening can be a real challenge without some sort of "system". repeatable geometry is a must for decent work. hit or miss geometry usually gives hit or miss results.
much of the fg stuff i got from my dentist was diamond worn out at the point. grind away the point and you have some very useful tiny tools. the stuff i got seems to be 3 different grits. free and effortless to reshape to yer purpose.
practice will eliminate the problem. it's simply a matter of maintaining control thruout the cut. if you can find some junk pewter, say at a yard sale that would be good for practice. the stuff is very soft.