Steve, impressive documentation!!!
We hate pointing out things which are not 'strictly correct' for fear of setting off criticism for pointing them out, if you know what I mean, but you did ask.
The oil filter position is novel but will detract from the RGS image, why not fit it away in the tool box? I certainly applaud fitting an oil cooler if long'ish high speed runs are contemplated. With an RGS cam and high compression the oil gets very hot otherwise.
The inner primary looks like the '50s version which was short where it comes over the gearbox sprocket, the RGS version extended further rearwards.
The engine plates look like aluminium, which I used on my Gold Star but they are not 'strictly correct' for an RGS.
Looking at the previous photos you posted, it seems you have mounted the rear sets directly to the frame mounting point but there would normally have been kinked plates between the footrests and the mount points.
The outer primary cover also looks like a '50s cover.
The headlight shell looks like a modern non RGS version, but if the RGS one was in the bits that came with the bike and is still in your possession don't throw it away no matter what condition it's in, they are virtually impossible to find and fetch silly money.
Regarding the top yoke you mentioned, the RGS top yoke did not have a hole for a steering lock e.g. Gold Star type, but I don't know what you fitted.
The front mudguard is mounted in the Gold Star manner, i.e. separate straps under the mudguard bolted through the mudguard. The RGS straps were part of the mudguard and so no bolt heads showed on it's outer face.
If you aren't using clip ons then RGSs would be fitted with chromed ears for the headlamp. With clip ons, instead of fork gaiters there would be black tubes covering the fork springs. You could consider doing what the Motor Cycle magazine showed in their 22 Nov '62 road test and use upturned touring bars, that's what I did.
Hope this helps, I will go away now and put my tin hat on!
Alan