I'll be a son of a gun.= こりゃたまげた 取り揃え
I guess you have to have dexterous hands. = よっぽど手がうまく動かないと駄目ですね。
dexterous(デクストレス) = 器用な
That's how I manage to stay two steps ahead of my creditors. = あれのおかげで何とか食べていけているので
Well, it's new. You'll get used to it. = いやあ、新しいからですよ。すぐに馴染みます。