Red Cut to 2K.dpx

Hello All,

First post, so please, go easy.

Good Red experience so far, please help it continue to go smooth!

So have edited the first cut of a short film, all shot 4k.
Used the red _M proxies, as the _P proxies seemed to have varied frame sizes.
Sync'd rushes (yawn) and did cut mostly on 2.4 ghz macbookpro, and 2 usb2 drives(!), fcp 6.0.3.
Mostly it worked fine. Only probs were playback of fx, simple flops. pushes, titles, spaces.
Basically anything not redcode. Then just rt stop sign, occasional redcode error crash.

(One scare was a couple of corrupt clips, kept turning viewer and canvas green.
Then all clips before and after opened green. Suspect it was from turning camera off n on too quickly.
Non usable footage anyway. Once identified this and deleted from project all cool.)

Loaded rushes on 2.66 quad, 3tb internal raid 0. Relink project, all groovy.
Export for emailable.mov was a bit more of a problem.
Removed all fx spaces etc. Exported redcode qt would crash compressor, squeeze, s'clip.
Eventually exported chapters using fcps qt conversion, prores , then rebuilt other elements in new timeline. Re export h.264 to size. That bits all done, great.

There'll be a couple more drafts, there must be a better export method?

Delivery is to be 2K.dpx files, to send to grade.
How do I get the _M cut to this format?

Do I relink the cut to the 2k proxies? How? Then Fcp export?
Or how do I use the red software to get .dpx?
Which is faster, easier, best results?

Thanks for reading, thanks for replies.

Seb