Plugin for framerate conversion?

Hi,

I have a bunch of files that need conversion from 30 to 25 fps. I found a few options on the internet, but the're all a few years old by now. Now I'm wondering if there is an efficient way of doing this with FCP X?

I tried to do it without a plugin (make a project 25 fps by dropping in a clip with the correct settings, than drop de 30 fps in it, render and export it) and that gave a decent result, but I'm hoping for something better.

Anyone familiar with this?

I use Compressor for this all the time.

Or MPEG Streamclip.

I didn't try it, but I heard JES Deinterlacer works great (and is free). Is little complicated to set-up, though.