I disagree ... very few workshop knows the nature of the problem let alone fix it. APD in Glenmarie for example have fixed an E46 325 SMG actuator by installing an O-Ring bought from another known workshop that have the correct O-Ring. So there's only two workshop that i know off that have done O-Ring replacement.
The BMW solution is the 1st tried solution ever done which was graciously shared on the forum (bimmerfest) by a bmw enthuthiast like us.
One of these days we need to do a meet up and share what we know.
yes, i think we should.
But as far as i know most of the workshop just wan to earn more, especially see us(smg owner) = kinda like good to potong, cause so many thing can name out to ask owner change.
By the way, i think most of our smg part can be bought from ZF. Cause i went through a gearbbox specialist, he told me might not need to order from germany, cause zf usually have it.