I am thinking of getting a Geeetech A30 pro. This looks like a decent printer - good reviews and excellent price for the print volume (300 X 300 X 420). I would like to update to colour later on and 3D Chameleon likewise seems decent - good reviews and excellent price. The question is - are they compatible? Any one tried this? If not are there any similar printers (in terms of build volume and price) that would work?