I am very happy with the way both my topends run I have had many conversations with people as to what will and wont work so I was ahead of the game as far as trial and error.. but in no way was it cheaper than sending it off to someone, the time it takes and tooling is more than the 250-600 for porting
would my setup be better if someone else did it?? maybe so but as it is right now after its first trip it will hold its own with the guys I ride with so I was more than happy.. I will be trying a few more things with my domes and I want to actully tune it in I'm sure there is a good amount of power still there.
bottom line if you think you will save money dont waste your time
if your afraid you will wreck a set of cyl dont do it cause there is a good chance you will
the only reason to do it is if you enjoy it and want to have the satisfaction knowing you did it.. bottom line