I have a meeting tomorrow so thought I had better go armed with information, so did some checking today.
Firstly I put the beam back on the studs so I could check all the clearances around the the straps. Happy to find that plenty of room, to be able to get to the nuts on the larger strap.
This rev B strap fitted but there are a couple of issues. Underneath the lowest part of the tank it needs a bit more clearance. Probably a couple of mm as there is a rubber gasket to fit on top of the strap.
Also at the rear of the strap it needs to be slightly closer to the tank.
This is easy enough to sort, just means reducing the length between the two bends.
On the smaller of the straps....
Its a bit difficult to see, but the strap is in place with the rubber cushion on it and no clearance issues as far as I can see.
One thing that I did spot today was that the BMW straps I took off my car are different to the BMW straps I picked up a while back. It looks like the design was changed to possibly give more support to the tank.
This was the same on both straps. The hook end wasn't altered.
NB The new two piece replacement straps are based on the later version.