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I have the DAP Big Boy that is equipped with proto 1, is it a worthwhile investment to upgrade it to 3.0? I have never done an upgrade but if I do upgrade it does it them have full DCS function? If I take it to an MTH repair shop to be done, what is the cost? Any opinions are appreciated, I have never upgraded anything before, but I love this engine so much and think having full DCS functions on it would be a great thing to have and I would think be much cheaper than buying a new version of it, especially since its the DAP version

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Upgraded one of these early on and then also bought the newer big boy recently. If the budget is somewhat tight would say this is worth it. The upgrade was not that hard, just time consuming. The upgrade sound track sounds nice. Painted the wheel rims and hand rails black, and detail painted gauges, etc. Your not going to get quite the detail of the new mth big boy, cab doors, steam or quil whistle and still be stuck with the curly tether. Still nice looking and a good runner.

I recently did two of those DAP BB engines.   It is a good engine to do.   Like George stated, be sure the person working on it knows what he is doing.  The hobby has several self proclaimed experts that should not be allowed near other peoples trains.  You are lucky you live in my favorite state of Pennsylvania.  Many good people to choose from.  

When you are done, your BB will be worth more as a PS3 engine than when you started.   Good luck and enjoy.

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