Oh dear lord! Diving in general is dangerous enough. Going out and deliberately using equipment that by today's standard can only be described as 'primitive' just scares me spitless. On those rare occasions when I dive, I dive free. That guarantees I can't get so deep I can get into trouble and since I'm not competitive enough to risk SWB I think I'm relatively safe. Yes, I read the part where you are very experienced and the part where you recommended complete inspection by a trained professional. I'm sure you are a safe enough diver to live a long, healthy life. Good on yer, but I'd hate to see anyone less experienced even get excited about the idea of Vintage Diving.