Reddit mentions of OP/TECH USA Super Pro Strap - Design B (Black)

It's an amazing camera, but yes it is quite heavy. I usually have it (actually an RZ67 Pro II) around my neck anyway, and I have a backpack to hold the extra lenses, film backs, accessories, and a tripod. Kind of evens out the weight distribution on your body. I've gone out walking for a couple of hours like this and when I do I'm not outrunning anything faster than a toad, but it's worth it when you get the shot. :-)

I use this strap, which has a bit of spring to it, lessening the impact of the camera's weight. It's a great investment.

Here you go :D mamiya neck strap

Congrats!

Just a few tips I've come up with since I've owned mine:

• Get a really good neck strap. I use this one.
  
  
• I would recommend having two film backs so you can use two different types of film at once. It's nice having a 100 ISO and higher ISO or a color and a B&W roll going at the same time. Having replaceable film backs is the big perk of this camera.
  
  
• Also, having a monopod makes it easier to take shots while walking around.
  
  
• I store my entire kit in a LowePro backpack. It makes it easy to carry and lug around.
  
  
• Definitely get a shutter release cable. I use it all the time when I'm shooting on a tripod. Since the camera is so heavy, not touching it means there is less of a chance of it falling over.

Measure your lugs before ordering, but I carry my RB67 (a massive 6 pound monster) on one of these:

OP/TECH USA 5401012 Super Pro Strap - Design B (Black) https://www.amazon.com/dp/B00092LFW6/ref=cm_sw_r_cp_apa_IgAxzbV9210CF


It has actual cushion and makes the carrying experience as comfortable as possible.

The best way to attach a strap is to get an original set of lugs and an original strap. There are also good aftermarket straps such as a number of OP/TECH straps that come with lugs.

I actually like the RZ67 and 645AF straps the best for my 1000S, and you can still get them new. I got a new-in-plastic black RZ strap, with a gold embroidered "Mamiya" logo and lugs, on eBay for ~$25.

I've never heard that there are different lug sizes out there, but that wouldn't surprise me -- Mamiya made the 1000S for like 15 years. Most of the changes happened in the first few years though, such as the shift from the "Mamiya" logo to the "Mamiya 645" logo, the introduction of the "S" accessories (updates to the originals, like the WLF S, PD Prism S, Extension tube #3 S, the 55/2.8 S and the 45/2.8 S), and the replacement of the original 105-210 with the updated one, for example. After about 1980 the system was pretty stable.

I've been using this strap. It's pretty comfortable with the padding and for $15 it's hard to beat even though it doesn't look amazing.

I also use a tripod 75% of the time but find no issue with hand holding with speeds of 125th and up. It isn't a camera you get for quick street shooting imo.

You'll want to become familiar with how the mirror lockup mode works (and get a cable release), as that's going to be pretty helpful with slower shutter speeds.

Also in mirror release there's sometimes a delay between firing off the shutter and the shutter actually firing. Not a long one, could be a fraction of a second, but it's enough to catch you out if you're rushing.

Don't rush this camera.

You'll probably want one of these.

Also use cheaper film for the first test roll (I like using Fomapan 100 to test cameras... actually it's a nice oldschool film but it's usually less expensive than Kodak or Illford) since your filmback might have light leaks. Mine does around the hinges (I wrap the thing in gaffer tape, at least until I get my hands on a new seal kit.

It definitely started out pretty clunky, but I'm super used to it at this point. I walk miles with it around my shoulder or in my bag, shooting mostly handheld. This is the strap that I use and I would recommend getting something similar. It's a heavy camera, and the extra padding this strap has is super helpful.

Might be a little late but have you looked into Optech straps? Their Pro B strap connector might work and as a bonus the neck strap is super comfortable.