The Butter Spilled on the Cot

I recorded myself saying this with my normal accent first. My "cot" sound is very quick, as is "butter." Here's the spectrogram of my normal accent followed by the spectrogram of my attempt at a regional accent (see if you can guess the region):



Ok, so the main differences I see are that the "cot" sound is really long in the accented spectrogram. In addition, I think I have harder sounds in the my original recording for the "er" in butter and the "l" sounds in spilled.

The accent was supposed to be a New England accent...I think. My accent is from Washington, DC.