To answer your question about a strap, I have a perfect solution (in my opinion). I use David Grubbs' Wapiti Straps on my DSLRs and I wanted to try to rig one up to my 500CM, so I cannibalized the original clips of a very weathered and worn out Hasselblad strap and threaded the Wapiti Strap onto the clips. Works perfectly! Supports the weight of a V-series camera comfortably and is able to be ordered in any length as well. It's like $33 from David's website.