I was looking at a pre- bent, un-drilled AK receiver at my gunstore. How hard would it be to drill and cut it out? If it's doable, I can buy the receiver for less than $50 and the kits on gunbroker for $200-$300 and have a decent AK. Has any one else on here tried this? If I got the 80%, could I legally have someone else (machine shop) finish it for me and return it to me with out a transfer?