I have been lent a Wista 45DX which I've now run out a couple of times, and am thoroughly enjoying the experience. I realise I'm too late for the joys of polaroid type 55, which is sad, but was hoping to play around with the new fuji 4x5 instant films. My question is - does any one out there have experience with the Wista DX and know whether it can take a polaroid 550 or Fuji PA45 pack-holder? It looks like there might be space but I know they are large ... Thanks in advance.