Re: a couple ranking questions
Possibly you could ask your Sensei to write you a letter of introduction to whichever dojo you plan on attending. If he/she explained your proficiency level regarding techniques, ukemi and overall grasp of the material, your new instructor might have an easier time either accepting your current rank or deciding what you need to learn to hold that rank in his/her dojo. Who knows, they might even decide you are ready to test for higher rank.
I would rather be over-qualified rather than under qualified for whatever rank i held (which is none), if i held a rank (which i don't). The last thing I would want would be to give the impression I had a mastery of something that in actuality i knew little to nothing about. Could be potentially dangerous to be overestimated.
"Give them nothing!"