Hi

I've just built one of these today and am slowly getting it going.

The SD card reader on my control board was faulty too, but I managed to dislodge the spring catch by putting a thin kitchen knife into it (with the power off of course). Then after "squidging" the card in a few times it started to click in as it should.

I must say I'm quite impressed with it so far. I'm currently printing out some spacers to fix the horrendous x axis wobble.