Quick update - my series VII to 52mm adaptor ring has arrived. I’ve had to resort to taping it to the b&h as the X and Y weren’t aligning properly when everything was screwed in. I can definitely see a benefit of using a clamp to connect it from the taking lense to the B&H.
For the time being I’ve taped a 52mm ring to the front so I can use my ircut and VND filters.
Thanks for clarifying. It's reassuring to hear that I didn't end up with a dud.
It was pretty easy taking apart the front element. Screws weren't seized or anything like that. Hardest part was looking for the appropriate tools to get them off.
Gave the glass a good clean with hydrogen peroxide and ammonia, rinsed it off then polished it off with isopropryl alcohol and it was good as new.
It gave me a good chance to check out how the thing was built and put together. I can see why you persevered with this @Bold . I'm loving the simplicity of the design! Just waiting on the series VII to 58mm adaptor to arrive. I might still go with a clamp as I'm not that assured with the smallrig lense support and rig system. The adaptor feels like it'd be a weak link in the chain from taking lense to the B&H.