Laser retrofit

Hello Guys,
New member here. I have been a cnc guy for many years, have a 4x8 Camaster with Vectric software and WINCNC control board. I want to put a laser on the gantry to do engraving, possibly 3D and cutting. I will first have get the proper laser at a reasonable price than match it to my control card. I would appreciate any input from the members as to problems I will encounter and which laser to purchase and then how to hook it up and make it work.

Thanks guys,
Tony