Hi Guys I have been a long lime lurker here but am seriously thinking about purchasing an LG500 laser engraver from GWEIKI. any suggestions on accessories to get? I have all ready seen auto focus is not worth the investment what about any of the others? Any advice on shipping or shippers to use in the states? I am looking at an 80 w tube to engrave and cut up to 19mm cast acrylic any help would be greatly appreciated Thanks