Nice looking! Did you do it yourself? Is the frame stainless? And are you going to leave the finished edges more flat with the bob profile or more rounded?
Can I send you some of mine? Seriously I always enjoy seeing people that take the initiative to do their own work. And I encourage it. That's how I started. And I also welcome any phone calls from people that want to get more information on how to do this kind of work. So if you don't want to get someone to do your work and you have the desire to learn, please call if I can be of any help.
There is a bobtail install jig available from Ed Brown. You chuck it in a vise and then center the drill press over the new hole, aligning the drill bit exactly with the hole in the jig that represents the new hole in the frame. Then slip the frame on the jig and pin it in place with the old hole. Then just drill the frame using the new hole placement in the jig as the guide. They say to flip the frame over to drill each hole. I would not do that. They may end out of alignment. Just keep pushing on through and make the hole on both sides. You just have to MAKE SURE that the frame and jig are absolutely level and square. I used a runout guage to make sure. Then you cut, grind, or file the excess metal off to match the profile of the bob. I have made a jig to do this drilling on the mill, but the Ed Brown jig works fine if you take the time to set it up right. And you need a pretty good drill press or mill to do this. Never by hand unless you have the hands of a surgeon. Then just use a good sharp flat file to dress down the frame. If you take your time and just take off a little metal at a time it is not hard, just time consuming. And the jig works well enough that it should take most of the fear factor out of drilling the frame. Like I said, I always encourage people to do their own work and it makes me happy to see it. You could do your own bob with just a good drill press, the Ed Brown jig and maybe a dremel to cut off the excess material and then a flat file to do the final work. And then there is the refinishing. The spray can finishes from Brownell's can do a nice job. You will need access to a blast cabinet to do the final prep. I use a mix of 80 grit aluminum oxide and 120 grit glass. And Duracoat. The reason I like the Duracoat is that it does not need the frame or parts to be degreased and prepped like other finishes. Just media blast, blow off the part and then paint. And it is air dry, not heat cured. And it is one of the most durable finishes out there. But there is a trick that they don't tell you. After painting you must let the parts cure for 2-3 days before assembly. They tell you 1 hour but the paint is still tender at this point and will peel or scratch. Let them sit and dry for at least 24 hours before assembly.
Not sure that this thread was going to be a how to, but I also would be happy to show some pics of how I do the bob if someone would be interested. I have one here that has been drilled and I could take some pics of the process. But it would make the frame look like a "train wreck" so they would not be pretty finish pics.