Hey Chuck, that was my video so I'll respond. No I didn't have to replace the motor pods. They were siezed up or very crunchy, but after taking them apart and clean out all the sand I could they were 95% better. They make a little bit more noise, but it's minimal. I actually sent it back to 3DR just to be sure, and they didn't say anything needed to be addressed. Solid bird.
Yeah the biggest risk with flying these is the return home height. I would make sure and set yours to at least 95ft to get above manmade objects, and address the environment in case more elevation would be desirable, such as this video demonstrates.