i used batterbee who did a good job but it took a long time to actually get to me as i had to postpone first date...they are VERY busy and told me they will be working on our roofs for at least another two years! i was not in a hurry as the later they did it, the longer my new warranty would last
also had them install a solar tube while they were at it. am still waiting for paperwork on the additional warranty i purchased.