If you see yourself doing more repairs in the future it might be a good idea to put a little more money into your tools
I honestly really enjoyed fixing my Duo when I first came here at the end of last year. All of the info I have gathered and trying out different things like the RGB and region mods I have become very comfortable with working on this console.
Just this past weekend 10/24/15 I redid my Sega Genesis / SegaCD as well. I went a step further on that console and replaced the 7805's. All seems well and good. I did this to branch out into other consoles to see how they were. Honestly the Duo is harder to work on because of the leaky caps and just overall how many there are.
I have done a few other Duo's here where I am and all has always turned out good. One I had to test what seemed like every trace on the board to see where the voltage wasn't going but I eventually found it and had another working Duo. I snagged up a couple consoles from Japan that I am going to attempt to repair and sell so hopefully all goes well their.
I don't want to break any new ground with modding like Turbokon
but I do want to become a respected console repair person here if most of the others are busy and backed up with orders.
Be sure to report back on how you like it!
Oh I will, I am sure it's gonna be a good change for me since I will be able to actually control the temps.